Revert "update: kernel-modules-hook-hardlinks: fix umount issue caused by udevd try 1"

This reverts commit 3591f5ee9e.

kernel-modules-hook-hardlinks/linux-modules-restore

@@ -4,18 +4,8 @@ kver=$(uname -r)
 while read -r line; do
     # We only care about the running kernel
     if [[ "$line" == usr/lib/modules/$kver/vmlinuz && -d usr/lib/modules/running-kernel ]];then
-        mount --mkdir --bind --options ro /usr/lib/modules/{running-kernel,$kver} || continue
+        mount --mkdir --bind --options ro /usr/lib/modules/{running-kernel,$kver}
         # Mounting read-only since the only modification here should be unmounting
         # when rebooting or reinstalling the running kernel
-        mount_unit="usr-lib-modules-${kver//-/\\x2d}.mount"
-        install -Dm644 <(
-cat << EOF
-[Unit]
-After=$mount_unit
-Requires=$mount_unit
-EOF
-        ) /run/systemd/system/systemd-udevd.service.d/kernel-modules-hook-hardlinks.conf
-        systemctl daemon-reload
-        # Required for clean umount on shutdown
     fi
 done

kernel-modules-hook-hardlinks/linux-modules-save

@@ -9,8 +9,7 @@ while read -r line; do
             # This means we already ran that hook during 'remove case'
             #
             # Remove the mount so we can reinstall the kernel
-            # Fixme: systemd-udevd would likely block the umount
-            umount /${line%vmlinuz}
+            umount ${line%vmlinuz}
         elif [[ -f "$line" && ! -d "/usr/lib/modules/running-kernel/" ]];then
             # Kernel install is present and we do not have a copy
             #