We can use system protobuf now unconditionally since ports r366656
Revert "Add a patch to allow building on live systems (per popular request)."

This reverts commit d5d33067de1cb9ae6bf7ed1c6408a815d89aac6a.

This will be no longer necessary after the next commit.
Sync with Ports Tree.
Bump beta to 38.0.2125.24