Subject: Do not check for installed packages, they are pulled as Requires of livecd-tools
From: Andrey Grigorev <survolog@yandex.ru>

diff -ur livecd-tools-livecd-tools-28.0/imgcreate/live.py livecd-tools-livecd-tools-28.0_patched/imgcreate/live.py
--- livecd-tools-livecd-tools-28.0/imgcreate/live.py	2021-05-20 15:59:48.525926000 +0300
+++ livecd-tools-livecd-tools-28.0_patched/imgcreate/live.py	2021-05-20 18:24:08.064137756 +0300
@@ -399,10 +399,7 @@
         return options
 
     def _get_required_packages(self):
-        return ["grub2-efi-x64", "grub2-efi-x64-cdboot", "shim-x64"] \
-               + ["grub2-efi-ia32", "grub2-efi-ia32-cdboot", "shim-ia32"] \
-               + ["syslinux"] \
-               + LiveImageCreatorBase._get_required_packages(self)
+        return LiveImageCreatorBase._get_required_packages(self)
 
     def _get_isolinux_stanzas(self, isodir):
         return ""
@@ -853,8 +850,7 @@
                  "-hfs-bless", isodir + "/ppc/mac"]
 
     def _get_required_packages(self):
-        return ["yaboot"] + \
-               LiveImageCreatorBase._get_required_packages(self)
+        return LiveImageCreatorBase._get_required_packages(self)
 
     def _get_excluded_packages(self):
         # kind of hacky, but exclude memtest86+ on ppc so it can stay in cfg
@@ -1056,8 +1052,7 @@
         return options
 
     def _get_required_packages(self):
-        return ["grub2-efi-aa64", "grub2-efi-aa64-cdboot", "shim-aa64"] \
-               + LiveImageCreatorBase._get_required_packages(self)
+        return LiveImageCreatorBase._get_required_packages(self)
 
     def __copy_kernel_and_initramfs(self, isodir, version, index):
         bootdir = self._instroot + "/boot"