refactor: remove git:unlock command

This is no longer necessary with improvements elsewhere in Dokku.

plugins/common/functions

@@ -997,13 +997,14 @@ suppress_output() {
   declare desc="suppress all output from a given command unless there is an error"
   local TMP_COMMAND_OUTPUT
   TMP_COMMAND_OUTPUT=$(mktemp "/tmp/dokku-${DOKKU_PID}-${FUNCNAME[0]}.XXXXXX")
-  trap "rm -rf '$TMP_COMMAND_OUTPUT' >/dev/null" RETURN
 
   "$@" >"$TMP_COMMAND_OUTPUT" 2>&1 || {
     local exit_code="$?"
     cat "$TMP_COMMAND_OUTPUT"
+    rm -rf "$TMP_COMMAND_OUTPUT" >/dev/null
     return "$exit_code"
   }
+  rm -rf "$TMP_COMMAND_OUTPUT" >/dev/null
   return 0
 }