Tests: Remove deprecated aiida/manage/tests/main module

This module had been deprecated and replaced a long time ago in favor of
`pytest` based fixtures that provide a complete testing environment with
test profiles being created on-the-fly.

.github/workflows/tests.sh

@@ -5,9 +5,7 @@ set -ev
 SYSTEM_TESTS="${GITHUB_WORKSPACE}/.github/system_tests"
 
 # tests for the testing infrastructure
-pytest --cov aiida --verbose --noconftest ${SYSTEM_TESTS}/test_test_manager.py
 pytest --cov aiida --verbose --noconftest ${SYSTEM_TESTS}/test_ipython_magics.py
-pytest --cov aiida --verbose --noconftest ${SYSTEM_TESTS}/test_profile_manager.py
 
 # Until the `${SYSTEM_TESTS}/pytest` tests are moved within `tests` we have to run them separately and pass in the path to the
 # `conftest.py` explicitly, because otherwise it won't be able to find the fixtures it provides

aiida/manage/tests/__init__.py

@@ -10,22 +10,3 @@
 """
 Testing infrastructure for easy testing of AiiDA plugins.
 """
-
-# AUTO-GENERATED
-
-# yapf: disable
-# pylint: disable=wildcard-import
-
-from .main import *
-
-__all__ = (
-    'ProfileManager',
-    'TemporaryProfileManager',
-    'TestManager',
-    'TestManagerError',
-    'get_test_backend_name',
-    'get_test_profile_name',
-    'test_manager',
-)
-
-# yapf: enable