fix linter warnings: unused imports

.pylintrc

@@ -0,0 +1,3 @@
+[MESSAGES CONTROL]
+
+disable=missing-docstring

tests/test_annotation.py

@@ -1,5 +1,3 @@
-import os
-
 from freesurfer_surface import Annotation
 
 from conftest import ANNOTATION_FILE_PATH

tests/test_main.py

@@ -4,8 +4,6 @@ import subprocess
 import typing
 import unittest.mock
 
-import pytest
-
 from freesurfer_surface.__main__ import annotation_labels
 
 from conftest import ANNOTATION_FILE_PATH