fix(generator): remove encoding and pragma no cover from _compat.py header

Author: hebaalazzeh

packages/gapic-generator/gapic/templates/%namespace/%name_%version/%sub/_compat.py.j2

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-# pragma: NO COVER
 # {% include '_license.j2' %}
 
 import uuid

packages/gapic-generator/tests/integration/goldens/storagebatchoperations/google/cloud/storagebatchoperations_v1/_compat.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-# pragma: NO COVER
 # Copyright 2026 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");