remove unused import

Author: ephur

tests/backends/test_gcs.py

@@ -12,8 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from unittest import mock
-from unittest.mock import call, patch
+from unittest.mock import patch
 
 import pytest
 from tfworker.backends.base import BackendError

tests/util/test_copier.py

@@ -19,8 +19,7 @@
 from unittest.mock import patch
 
 import pytest
-from tfworker.util.copier import (Copier, CopyFactory, FileSystemCopier,
-                                  GitCopier)
+from tfworker.util.copier import Copier, CopyFactory, FileSystemCopier, GitCopier
 
 C_CONFLICTS = ["test.txt", "foo", "test.tf"]
 C_SOURCE = "test_source"