pep8 linting

Author: echedey-ls

pvlib/tests/test_modelchain.py

@@ -7,13 +7,10 @@
 from pvlib.modelchain import ModelChain
 from pvlib.pvsystem import PVSystem
 from pvlib.location import Location
-from pvlib._deprecation import pvlibDeprecationWarning
 
 from .conftest import assert_series_equal, assert_frame_equal
 import pytest
 
-from .conftest import fail_on_pvlib_version
-
 
 @pytest.fixture(scope='function')
 def sapm_dc_snl_ac_system(sapm_module_params, cec_inverter_parameters,