Remove unnecessary executable bits

This removes the executable bits from files which aren't supposed to
have them.

Also removes shebangs for files which aren't supposed to be executable.

source/tools/i18n/extractors/extractors.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python3
-#
 # Copyright (C) 2024 Wildfire Games.
 # All rights reserved.
 #