templates: Drop nomodeset / basic graphics menu from live configs

nomodeset no long does anything helpful, and inst.text doesn't make sense
with a live image so drop the menu from the live image.

Related: rhbz#1961092

share/templates.d/99-generic/live/config_files/aarch64/grub2-efi.cfg

@@ -34,9 +34,3 @@ menuentry 'Test this media & start @PRODUCT@ @VERSION@' --class red --class gnu-
 	linux @KERNELPATH@ @ROOT@ @EXTRA@ rd.live.image rd.live.check quiet
 	initrd @INITRDPATH@
 }
-submenu 'Troubleshooting -->' {
-	menuentry 'Install @PRODUCT@ @VERSION@ in basic graphics mode' --class red --class gnu-linux --class gnu --class os {
-		linux @KERNELPATH@ @ROOT@ @EXTRA@ rd.live.image nomodeset quiet
-		initrd @INITRDPATH@
-	}
-}

share/templates.d/99-generic/live/config_files/x86/grub2-efi.cfg

@@ -28,9 +28,3 @@ menuentry 'Test this media & start @PRODUCT@ @VERSION@' --class fedora --class g
 	linuxefi @KERNELPATH@ @ROOT@ @EXTRA@ rd.live.image rd.live.check quiet
 	initrdefi @INITRDPATH@
 }
-submenu 'Troubleshooting -->' {
-	menuentry 'Start @PRODUCT@ @VERSION@ in basic graphics mode' --class fedora --class gnu-linux --class gnu --class os {
-		linuxefi @KERNELPATH@ @ROOT@ @EXTRA@ rd.live.image nomodeset quiet
-		initrdefi @INITRDPATH@
-	}
-}

share/templates.d/99-generic/live/config_files/x86/isolinux.cfg

@@ -75,16 +75,6 @@ menu separator # insert an empty line
 menu begin ^Troubleshooting
   menu title Troubleshooting
 
-label vesa
-  menu indent count 5
-  menu label Start @PRODUCT@ @VERSION@ in ^basic graphics mode
-  text help
-	Try this option out if you're having trouble starting
-	@PRODUCT@ @VERSION@.
-  endtext
-  kernel vmlinuz
-  append initrd=initrd.img @ROOT@ @EXTRA@ rd.live.image nomodeset quiet
-
 label memtest
   menu label Run a ^memory test
   text help