release: update-manpages: revert color filtering

We pull a pinned help2man from cipd now, so we should get stable
behavior between developers.  That means the color filtering should
not be necessary anymore, and we can drop the logic & unittest.

Change-Id: Ib53e1ce7f8d610d7f624c9a019c79dc5f438ac0d
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/582402
Tested-by: Mike Frysinger <vapier@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>

tests/test_update_manpages.py

@@ -1,23 +0,0 @@
-# Copyright (C) 2022 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Unittests for the update_manpages module."""
-
-from release import update_manpages
-
-
-def test_replace_regex() -> None:
-    """Check that replace_regex works."""
-    data = "\n\033[1mSummary\033[m\n"
-    assert update_manpages.replace_regex(data) == "\nSummary\n"