Remove build_sass

setup.py

@@ -10,18 +10,7 @@ def find_scripts():
                 yield candidate
 
 
-# Ensure CSS files are built every time build is invoked
-# build.sub_commands = [('build_sass', None)] + build.sub_commands
-
-
 setup(
-    setup_requires=['libsass', 'setuptools_scm'],
+    setup_requires=['setuptools_scm'],
     scripts=list(find_scripts()),
-    sass_manifests={
-        'nav.web': {
-            'sass_path': 'sass',
-            'css_path': 'static/css',
-            'strip_extension': True,
-        },
-    },
 )