revert(lvm): remove lvmetad config changes

Remove support for modifying use_lvmetad and locking_type
settings in lvm.conf for lvm versions 2.2.*.  Recent lvm
versions (2.3.*) do not include lvmetad or locking_type.
This cleanup simplifies code maintenance.

To use the lvm module with older versions (2.2), a user
would need to ensure that lvmetad settings are disabled
in the initrd's lvm.conf rather than relying on the lvm
dracut mode to modify their lvm.conf.

modules.d/90lvm/lvm_scan.sh

@@ -28,10 +28,7 @@ if [ ! -e /etc/lvm/lvm.conf ]; then
         echo '"r/.*/" ]'
         echo '}'
 
-        # establish LVM locking
         echo 'global {'
-        echo '    locking_type = 4'
-        echo '    use_lvmetad = 0'
         echo '}'
     } > /etc/lvm/lvm.conf
     lvmwritten=1

modules.d/90lvm/module-setup.sh

@@ -61,10 +61,6 @@ install() {
     if [[ $hostonly ]] || [[ $lvmconf == "yes" ]]; then
         if [[ -f $dracutsysrootdir/etc/lvm/lvm.conf ]]; then
             inst_simple -H /etc/lvm/lvm.conf
-            # FIXME: near-term hack to establish read-only locking;
-            # use command-line lvm.conf editor once it is available
-            sed -i -e 's/\(^[[:space:]]*\)locking_type[[:space:]]*=[[:space:]]*[[:digit:]]/\1locking_type = 4/' "${initdir}/etc/lvm/lvm.conf"
-            sed -i -e 's/\(^[[:space:]]*\)use_lvmetad[[:space:]]*=[[:space:]]*[[:digit:]]/\1use_lvmetad = 0/' "${initdir}/etc/lvm/lvm.conf"
         fi
 
         export LVM_SUPPRESS_FD_WARNINGS=1
@@ -82,16 +78,6 @@ install() {
         unset LVM_SUPPRESS_FD_WARNINGS
     fi
 
-    if ! [[ -e ${initdir}/etc/lvm/lvm.conf ]]; then
-        mkdir -p "${initdir}/etc/lvm"
-        {
-            echo 'global {'
-            echo 'locking_type = 4'
-            echo 'use_lvmetad = 0'
-            echo '}'
-        } > "${initdir}/etc/lvm/lvm.conf"
-    fi
-
     inst_rules 11-dm-lvm.rules 69-dm-lvm-metad.rules
 
     # Do not run lvmetad update via pvscan in udev rule  - lvmetad is not running yet in dracut!