targets: Use GRUB for BIOS boot

grub-mkrescue produces an ISO that is bootable from EFI as well as from
the BIOS, so isolinux isn't necessary to accomplish that. The benefits
are that (1) we reduce the number of dependencies required to make the
ISO, (2) the same GRUB set up works for EFI and BIOS systems, and (3)
grub-mkrescue replaces a whole lot of code that we no longer need to
maintain.

This patch has the side effect of removing the F[2-7] help texts and the
memtest86+ option, since those were done via isolinux. I feel okay
removing those since isolinux was only used on BIOS systems and not on
EFI, so none of those things were available to the vast majority of our
users.

It also has the side-effect of removing Fedora's signed UEFI shim
(sys-boot/shim) which could be used to add a hash for the live CD's grub
binary so that you could install under Secure Boot. That doesn't offer
any protection, and the author of the code indicated to me that the
value in offering this feature is that it allows installation on systems
with broken firmware under which important hardware (like the NVMe
drive) isn't exposed unless using Secure Boot. After quite a bit of
searching the internet, I can't find any mentions of this being a
problem.

Signed-off-by: Matt Turner <mattst88@gentoo.org>

6 files changed, 0 insertions, 122 deletions

diff --git a/livecd/files/x86-F2.msg b/livecd/files/x86-F2.msg
deleted file mode 100644
index eb1638b8..00000000
--- a/livecd/files/x86-F2.msg
+++ /dev/null
@@ -1,22 +0,0 @@
-Gentoo Linux LiveCD boot options - [F1 to display available kernels]
-
-Please hit F1 to see the available kernels on this livecd.  Please note that
-the -nofb counterparts to each kernel disable the framebuffer
-and splash images. Additionally, the memtest86 boot option is available
-to test local RAM for errors. To use memtest86, just type 'memtest86'.
-
-This lists the possible command line options that can be used to tweak the boot
-process of this CD.  This lists the Gentoo-specific options, along with a few
-options that are built-in to the kernel, but that have been proven very useful
-to our users.  Also, all options that start with "do" have a "no" inverse, that
-does the opposite.  For example, "doscsi" enables SCSI support in the initial
-ramdisk boot, while "noscsi" disables it.
-
-To list the options, please press keys from F3 through F7.
-
-F3: Hardware (Page 1)
-F4: Hardware (Page 2)
-F5: Hardware (Page 3)
-F6: Volume Management
-F7: Misc.
-
diff --git a/livecd/files/x86-F3.msg b/livecd/files/x86-F3.msg
deleted file mode 100644
index e0ec2bd8..00000000
--- a/livecd/files/x86-F3.msg
+++ /dev/null
@@ -1,22 +0,0 @@
-Hardware options (Page 1):
-acpi=on         This loads support for ACPI and also causes the acpid daemon to
-                be started by the CD on boot.  This is only needed if your
-                system requires ACPI to function properly.  This is not
-                required for Hyperthreading support.
-acpi=off        Completely disables ACPI.  This is useful on some older systems
-                and is also a requirement for using APM.  This will disable any
-                Hyperthreading support of your processor.
-console=X       This sets up serial console access for the CD.  The first
-                option is the device, usually ttyS0 on x86, followed by any
-                connection options, which are comma separated.  The default
-                options are 9600,8,n,1.
-dmraid=X        This allows for passing options to the device-mapper RAID
-                subsystem.  Options should be encapsulated in quotes.
-doapm           This loads APM driver support.  This requires you to also use
-                acpi=off.
-dopcmcia        This loads support for PCMCIA and Cardbus hardware and also
-                causes the pcmcia cardmgr to be started by the CD on boot.
-                This is only required when booting from PCMCIA/Cardbus devices.
-doscsi          This loads support for most SCSI controllers.  This is also a
-                requirement for booting most USB devices, as they use the SCSI
-                subsystem of the kernel.
diff --git a/livecd/files/x86-F4.msg b/livecd/files/x86-F4.msg
deleted file mode 100644
index 77ded0e3..00000000
--- a/livecd/files/x86-F4.msg
+++ /dev/null
@@ -1,20 +0,0 @@
-Hardware options (Page 2):
-hda=stroke      This allows you to partition the whole hard disk even when your
-                BIOS is unable to handle large disks.  This option is only used
-                on machines with an older BIOS.  Replace hda with the device
-                that is requiring this option.
-ide=nodma       This forces the disabling of DMA in the kernel and is required
-                by some IDE chipsets and also by some CDROM drives.  If your
-                system is having trouble reading from your IDE CDROM, try this
-                option.  This also disables the default hdparm settings from
-                being executed.
-noapic          This disables the Advanced Programmable Interrupt Controller
-                that is present on newer motherboards.  It has been known to
-                cause some problems on older hardware.
-nodetect        This disables all of the autodetection done by the CD,
-                including device autodetection and DHCP probing.  This is
-                useful for doing debugging of a failing CD or driver.
-nodhcp          This disables DHCP probing on detected network cards.  This is
-                useful on networks with only static addresses.
-nodmraid        Disables support for device-mapper RAID, such as that used for
-                on-board IDE/SATA RAID controllers.
diff --git a/livecd/files/x86-F5.msg b/livecd/files/x86-F5.msg
deleted file mode 100644
index adfb0197..00000000
--- a/livecd/files/x86-F5.msg
+++ /dev/null
@@ -1,22 +0,0 @@
-Hardware options (Page 3):
-nofirewire      This disables the loading of Firewire modules.  This should
-                only be necessary if your Firewire hardware is causing
-                a problem with booting the CD.
-nogpm           This diables gpm console mouse support.
-nohotplug       This disables the loading of the hotplug and coldplug init
-                scripts at boot.  This is useful for doing debugging of a
-                failing CD or driver.
-nokeymap        This disables the keymap selection used to select non-US
-                keyboard layouts.
-nolapic         This disables the local APIC on Uniprocessor kernels.
-nosata          This disables the loading of Serial ATA modules.  This is used
-                if your system is having problems with the SATA subsystem.
-nosmp           This disables SMP, or Symmetric Multiprocessing, on SMP-enabled
-                kernels.  This is useful for debugging SMP-related issues with
-                certain drivers and motherboards.
-nosound         This disables sound support and volume setting.  This is useful
-                for systems where sound support causes problems.
-nousb           This disables the autoloading of USB modules.  This is useful
-                for debugging USB issues.
-slowusb         This adds some extra pauses into the boot process for slow
-                USB CDROMs, like in the IBM BladeCenter.
diff --git a/livecd/files/x86-F6.msg b/livecd/files/x86-F6.msg
deleted file mode 100644
index b61ee9c9..00000000
--- a/livecd/files/x86-F6.msg
+++ /dev/null
@@ -1,14 +0,0 @@
-Volume/Device Management:
-doevms          This enables support for IBM's pluggable EVMS, or Enterprise
-                Volume Management System.  This is not safe to use with lvm2.
-dolvm           This enables support for Linux's Logical Volume Management.
-                This is not safe to use with evms2.
-Screen reader access:
-speakup.synth=synth  starts speakup using a given synthesizer.
-                     supported synths are acntpc, acntsa, apollo, audptr, bns,
-                     decext, dectlk, dtlk, keypc, ltlk, spkout and txprt.
-                     Also, soft is supported for software speech and dummy is
-                     supported for testing.
-speakup.quiet=1      sets the synthesizer not to speak until a key is pressed.
-speakup_SYNTH.port=n sets the port for internal synthesizers.
-speakup_SYNTH.ser=n  sets the serial port for external synthesizers.
diff --git a/livecd/files/x86-F7.msg b/livecd/files/x86-F7.msg
deleted file mode 100644
index 82306245..00000000
--- a/livecd/files/x86-F7.msg
+++ /dev/null
@@ -1,22 +0,0 @@
-Other options:
-debug           Enables debugging code.  This might get messy, as it displays
-                a lot of data to the screen.
-docache         This caches the entire runtime portion of the CD into RAM,
-                which allows you to umount /mnt/cdrom and mount another CDROM.
-                This option requires that you have at least twice as much
-                available RAM as the size of the CD.
-doload=X        This causes the initial ramdisk to load any module listed, as
-                well as dependencies.  Replace X with the module name.
-                Multiple modules can be specified by a comma-separated list.
-noload=X        This causes the initial ramdisk to skip the loading of a
-                specific module that may be causing a problem.  Syntax matches
-                that of doload.
-nox             This causes an X-enabled LiveCD to not automatically start X,
-                but rather, to drop to the command line instead.
-scandelay       This causes the CD to pause for 10 seconds during certain
-                portions the boot process to allow for devices that are slow to
-                initialize to be ready for use.
-scandelay=X     This allows you to specify a given delay, in seconds, to be
-                added to certain portions of the boot process to allow for
-                devices that are slow to initialize to be ready for use.
-                Replace X with the number of seconds to pause.