Replaced function with default variable value

zfs/zfs-clean.sh

@@ -1,9 +1,7 @@
 #!/bin/bash
 set -euo pipefail
 
-clear-apt-snaps () {
-    zfs list -t snapshot | grep 'apt-' | sed 's| .*$||g' | head -n -5 | xargs -d '\n' -I {} sudo zfs destroy {}
-}
+REGEX='apt-'
 
 if [ -z "$1" ]; then
     exit 1
@@ -19,9 +17,5 @@ if [ -n "$1" ] && [ "$1" == "upgrades" ]; then
         esac
     done
 
-    if [ -z "$REGEX" ]; then
-        clear-apt-snaps
-    else
     zfs list -t snapshot | grep "${REGEX}" | sed 's| .*$||g' | head -n -5 | xargs -d '\n' -I {} sudo zfs destroy {}
 fi
-fi