Tweaks, fixes, linting and docs

library/tests/conftest.py

@@ -70,12 +70,3 @@ def atexit():
     sys.modules['atexit'] = atexit
     yield atexit
     del sys.modules['atexit']
-
-
-@pytest.fixture(scope='function', autouse=False)
-def numpy():
-    """Mock numpy module."""
-    numpy = mock.MagicMock()
-    sys.modules['numpy'] = numpy
-    yield numpy
-    del sys.modules['numpy']

library/tests/test_setup.py

@@ -9,7 +9,7 @@ def test_moisture_setup(GPIO, smbus):
 def test_moisture_read_all(GPIO, smbus):
     from grow import moisture
     moisture._is_setup = False
-    
+
     result = moisture.read_all()
 
     assert type(result(1)) == float