Remove has_tables from conftest.py

Author: AdamRJensen

pvlib/tests/conftest.py

@@ -125,15 +125,6 @@ def assert_frame_equal(left, right, **kwargs):
     not has_xarray, reason='requires xarray')
 
 
-try:
-    import tables
-    has_tables = True
-except ImportError:
-    has_tables = False
-
-requires_tables = pytest.mark.skipif(not has_tables, reason='requires tables')
-
-
 try:
     import ephem
     has_ephem = True