aarch64: Fix live-iso creation on aarch64

Drop unneeded uboot-tools, and remove iso-graft from the aarch64.tmpl

Related: rhbz#1752002

share/templates.d/99-generic/live/aarch64.tmpl

@@ -66,13 +66,6 @@ mkdir ${KERNELDIR}
     %endif
 %endfor
 
-# Inherit iso-graft/ if it exists from external templates
-<%
-    import os
-    if os.path.exists(workdir + "/iso-graft"):
-        filegraft += " " + workdir + "/iso-graft"
-%>
-
 # Add the license files
 %for f in glob("/usr/share/licenses/*-release/*"):
     install ${f} ${f|basename}

share/templates.d/99-generic/live/live-install.tmpl

@@ -5,7 +5,6 @@
 %if basearch == "aarch64":
     installpkg efibootmgr
     installpkg grub2-efi-aa64-cdboot shim-aa64
-    installpkg uboot-tools
 %endif
 %if basearch in ("arm", "armhfp"):
     installpkg efibootmgr