Pyscss is obsolete with Dart CSS complier; remove all pyscss code.

third_party/pyscss/scss/tests/test_mixin.py

-import unittest
-
-from scss.parser import Stylesheet
-
-
-class TestSCSS( unittest.TestCase ):
-
-    def setUp(self):
-        self.parser = Stylesheet(options=dict(compress=True))
-
-    def test_mixin(self):
-        src = """
-        @mixin font {
-            font: {
-                weight: inherit;
-                style: inherit;
-                size: 100%;
-                family: inherit; };
-            vertical-align: baseline; }
-
-        @mixin global {
-            .global {
-                border:red;
-                @include font;
-            }
-        }
-
-        @include global;
-
-        @mixin rounded-top( $radius:10px ) {
-            $side: top;
-            border-#{$side}-radius: $radius;
-            -moz-border-radius-#{$side}: $radius;
-            -webkit-border-#{$side}-radius: $radius;
-        }
-        #navbar li { @include rounded-top; }
-        #footer { @include rounded-top(5px); }
-        """
-        test = ".global{border:#f00;vertical-align:baseline;font-weight:inherit;font-style:inherit;font-size:100%;font-family:inherit}#navbar li{border-top-radius:10px;-moz-border-radius-top:10px;-webkit-border-top-radius:10px}#footer{border-top-radius:5px;-moz-border-radius-top:5px;-webkit-border-top-radius:5px}"
-        out = self.parser.loads(src)
-        self.assertEqual(test, out)