Remove theme-overrides.css file

Web pack files come after it, removing its usability. Can do the same job with new setup.custom_css_files

Author: ascholerChemeketa

runestone/__init__.py

@@ -48,7 +48,7 @@ def runestone_static_dirs():
     module_static_js.append(os.path.join(basedir, "codelens", "js"))
     module_static_js.append(os.path.join(basedir, "webgldemo", "js"))
     module_static_js.append(os.path.join(basedir, "matrixeq", "js"))
-    module_static_css = [os.path.join(basedir, "common", "css", "sphinx")]
+    module_static_css = []
     module_static_css.append(os.path.join(basedir, "accessibility", "css"))
     module_static_css.append(os.path.join(basedir, "webgldemo", "css"))
     module_static_css.append(os.path.join(basedir, "matrixeq", "css"))
@@ -225,8 +225,6 @@ def build(options):
 css_files = [
     # Generated from a template, so it can't be directly included in the webpack.
     "bootstrap-sphinx.css",
-    # Deliberately excluded, so it can be overridden by a user-supplied CSs file.
-    "theme-overrides.css",
 ]