Remove unused imports

Author: Vasileios Karakasis

unittests/test_buildsystems.py

@@ -3,8 +3,6 @@
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
-import abc
-import functools
 import pytest
 
 import reframe.core.buildsystems as bs

unittests/test_cli.py

@@ -7,12 +7,10 @@
 import io
 import itertools
 import os
-import pathlib
 import pytest
 import re
 import sys
 
-import reframe.core.config as config
 import reframe.core.environments as env
 import reframe.core.logging as logging
 import reframe.core.runtime as rt

unittests/test_pipeline.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 import os
-import pathlib
 import pytest
 import re
 
@@ -14,8 +13,7 @@
 import reframe.utility.sanity as sn
 import unittests.fixtures as fixtures
 from reframe.core.exceptions import (BuildError, PipelineError, ReframeError,
-                                     ReframeSyntaxError, PerformanceError,
-                                     SanityError)
+                                     PerformanceError, SanityError)
 from reframe.frontend.loader import RegressionCheckLoader
 from unittests.resources.checks.hellocheck import HelloTest
 from unittests.resources.checks.pinnedcheck import PinnedTest
@@ -812,7 +810,6 @@ def __init__(self, a, b):
 
 
 def test_registration_of_tests():
-    import sys
     import unittests.resources.checks_unlisted.good as mod
 
     checks = mod._rfm_gettests()