Remove vestigial remnants of setup.cfg

Author: mkelley

MANIFEST.in

@@ -1,6 +1,5 @@
 include README.rst
 include CHANGES.rst
-include setup.cfg
 include LICENSE.rst
 include pyproject.toml
 

tox.ini

@@ -74,7 +74,7 @@ deps =
     devdeps: git+https://github.com/astropy/astroquery.git#egg=astroquery
     devdeps,mpldev: matplotlib>=0.0.dev0
 
-# The following indicates which extras_require from setup.cfg will be installed
+# The following indicates which extras_require from pyproject.toml will be installed
 extras =
     test: test
     alldeps: all
@@ -83,7 +83,7 @@ commands =
     pip freeze
 
     !cov: pytest --pyargs sbpy {toxinidir}/docs {env:MPLFLAGS} {posargs}
-    cov: pytest --pyargs sbpy  {env:MPLFLAGS} --cov sbpy --cov-config={toxinidir}/setup.cfg {posargs}
+    cov: pytest --pyargs sbpy  {env:MPLFLAGS} --cov sbpy {posargs}
     cov: coverage xml -o {toxinidir}/coverage.xml
 
 [testenv:build_docs]
@@ -106,7 +106,7 @@ commands =
     sphinx-build -W -b linkcheck . _build/html --keep-going
 
 [testenv:codestyle]
-# We list the warnings/errors to check for here rather than in setup.cfg because
+# We list the warnings/errors to check for here rather than in pyproject.toml because
 # we don't want these options to apply whenever anyone calls flake8 from the
 # command-line or their code editor - in this case all warnings/errors should be
 # checked for. The warnings/errors we check for here are: