DOC: Closes pandas-dev#24256 Fix flake8 issues in whatsnew v0.13.*

Added the setup.cfg file

Author: Seuss27

setup.cfg

@@ -45,14 +45,6 @@ ignore = E402,  # module level import not at top of file
          E703,  # statement ends with a semicolon
 
 exclude =
-    doc/source/whatsnew/v0.7.0.rst
-    doc/source/whatsnew/v0.7.3.rst
-    doc/source/whatsnew/v0.8.0.rst
-    doc/source/whatsnew/v0.9.0.rst
-    doc/source/whatsnew/v0.9.1.rst
-    doc/source/whatsnew/v0.10.0.rst
-    doc/source/whatsnew/v0.10.1.rst
-    doc/source/whatsnew/v0.11.0.rst
     doc/source/whatsnew/v0.12.0.rst
     doc/source/whatsnew/v0.15.0.rst
     doc/source/whatsnew/v0.15.1.rst
@@ -64,19 +56,10 @@ exclude =
     doc/source/whatsnew/v0.17.1.rst
     doc/source/whatsnew/v0.18.0.rst
     doc/source/whatsnew/v0.18.1.rst
-    doc/source/whatsnew/v0.19.0.rst
-    doc/source/whatsnew/v0.20.0.rst
-    doc/source/whatsnew/v0.21.0.rst
-    doc/source/whatsnew/v0.23.1.rst
-    doc/source/whatsnew/v0.23.2.rst
     doc/source/basics.rst
     doc/source/contributing_docstring.rst
     doc/source/enhancingperf.rst
     doc/source/groupby.rst
-    doc/source/indexing.rst
-    doc/source/missing_data.rst
-    doc/source/options.rst
-    doc/source/release.rst
 
 
 [yapf]