remove config for old linters

Author: cjw296

setup.cfg

@@ -1,24 +1,5 @@
 [bdist_wheel]
 universal = 1
 
-[flake8]
-ignore =
-    E126,E128,
-    E201,E202,E203,E221,E222,E225,E226,E231,E241,E251,E261,E262,E266,E271,E272,
-    E301,E302,E303,E305,
-    E501,
-    E701,E702,E704,E722,E731,
-    F401,F403,F405,
-    W504
-
-[isort]
-combine_as_imports = true
-default_section = THIRDPARTY
-include_trailing_comma = true
-known_first_party = xlrd
-multi_line_output = 5
-not_skip = __init__.py
-skip = .tox
-
 [metadata]
 license_file = LICENSE