refactor(os): Remove existing initramfs fallback files when we remove them from build instructions (#1)

setup.sh

@@ -269,6 +269,9 @@ function set_initramfs_build_list () {
         -e '/^fallback/d' \
         -e 's'$'\x1''^(PRESETS=)[^\r\n\f]*'$'\x1''\1('"'"'default'"'"')'$'\x1''g' \
         '/mnt/etc/mkinitcpio.d/linux.preset'
+
+    # Remove any existing fallback initramfs files
+    find '/mnt/boot' -type f -regextype posix-extended -iregex '^/mnt/boot/initramfs-.*?-fallback.img' -delete
 }
 
 function add_zfs_files_to_new_os () {