[mod] pylint all files with one profile / drop PYLINT_SEARXNG_DISABLE_OPTION

In the past, some files were tested with the standard profile, others with a
profile in which most of the messages were switched off ... some files were not
checked at all.

- ``PYLINT_SEARXNG_DISABLE_OPTION`` has been abolished
- the distinction ``# lint: pylint`` is no longer necessary
- the pylint tasks have been reduced from three to two

  1. ./searx/engines -> lint engines with additional builtins
  2. ./searx ./searxng_extra ./tests -> lint all other python files

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

tests/unit/test_search.py

@@ -1,4 +1,5 @@
-# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# pylint: disable=missing-module-docstring, invalid-name
 
 from copy import copy
 
@@ -23,7 +24,7 @@ TEST_ENGINES = [
 ]
 
 
-class SearchQueryTestCase(SearxTestCase):
+class SearchQueryTestCase(SearxTestCase):  # pylint: disable=missing-class-docstring
     def test_repr(self):
         s = SearchQuery('test', [EngineRef('bing', 'general')], 'all', 0, 1, '1', 5.0, 'g')
         self.assertEqual(
@@ -42,10 +43,10 @@ class SearchQueryTestCase(SearxTestCase):
         self.assertEqual(s, t)
 
 
-class SearchTestCase(SearxTestCase):
+class SearchTestCase(SearxTestCase):  # pylint: disable=missing-class-docstring
     def setUp(self):
 
-        from searx import webapp  # pylint disable=import-outside-toplevel
+        from searx import webapp  # pylint: disable=import-outside-toplevel
 
         self.app = webapp.app