Remove workaround for fixed upstream CSS issue

speced/bikeshed#1313 has been resolved, thus the styles can once again be removed.

They were introduced in #214.

resources.whatwg.org/standard.css

@@ -509,58 +509,3 @@ c-[vc] { color: #0077aa } /* Name.Variable.Class */
 c-[vg] { color: #0077aa } /* Name.Variable.Global */
 c-[vi] { color: #0077aa } /* Name.Variable.Instance */
 c-[il] { color: #000000 } /* Literal.Number.Integer.Long */
-
-/* Until https://github.com/tabatkins/bikeshed/issues/1313 is fixed. If this code is still here and
-   you notice that issue is closed, please submit a PR to remove this code. */
-.highlight .c { color: #708090 } /* Comment */
-.highlight .k { color: #990055 } /* Keyword */
-.highlight .l { color: #000000 } /* Literal */
-.highlight .n { color: #0077aa } /* Name */
-.highlight .o { color: #999999 } /* Operator */
-.highlight .p { color: #999999 } /* Punctuation */
-.highlight .cm { color: #708090 } /* Comment.Multiline */
-.highlight .cp { color: #708090 } /* Comment.Preproc */
-.highlight .c1 { color: #708090 } /* Comment.Single */
-.highlight .cs { color: #708090 } /* Comment.Special */
-.highlight .kc { color: #990055 } /* Keyword.Constant */
-.highlight .kd { color: #990055 } /* Keyword.Declaration */
-.highlight .kn { color: #990055 } /* Keyword.Namespace */
-.highlight .kp { color: #990055 } /* Keyword.Pseudo */
-.highlight .kr { color: #990055 } /* Keyword.Reserved */
-.highlight .kt { color: #990055 } /* Keyword.Type */
-.highlight .ld { color: #000000 } /* Literal.Date */
-.highlight .m { color: #000000 } /* Literal.Number */
-.highlight .s { color: #a67f59 } /* Literal.String */
-.highlight .na { color: #0077aa } /* Name.Attribute */
-.highlight .nc { color: #0077aa } /* Name.Class */
-.highlight .no { color: #0077aa } /* Name.Constant */
-.highlight .nd { color: #0077aa } /* Name.Decorator */
-.highlight .ni { color: #0077aa } /* Name.Entity */
-.highlight .ne { color: #0077aa } /* Name.Exception */
-.highlight .nf { color: #0077aa } /* Name.Function */
-.highlight .nl { color: #0077aa } /* Name.Label */
-.highlight .nn { color: #0077aa } /* Name.Namespace */
-.highlight .py { color: #0077aa } /* Name.Property */
-.highlight .nt { color: #669900 } /* Name.Tag */
-.highlight .nv { color: #222222 } /* Name.Variable */
-.highlight .ow { color: #999999 } /* Operator.Word */
-.highlight .mb { color: #000000 } /* Literal.Number.Bin */
-.highlight .mf { color: #000000 } /* Literal.Number.Float */
-.highlight .mh { color: #000000 } /* Literal.Number.Hex */
-.highlight .mi { color: #000000 } /* Literal.Number.Integer */
-.highlight .mo { color: #000000 } /* Literal.Number.Oct */
-.highlight .sb { color: #a67f59 } /* Literal.String.Backtick */
-.highlight .sc { color: #a67f59 } /* Literal.String.Char */
-.highlight .sd { color: #a67f59 } /* Literal.String.Doc */
-.highlight .s2 { color: #a67f59 } /* Literal.String.Double */
-.highlight .se { color: #a67f59 } /* Literal.String.Escape */
-.highlight .sh { color: #a67f59 } /* Literal.String.Heredoc */
-.highlight .si { color: #a67f59 } /* Literal.String.Interpol */
-.highlight .sx { color: #a67f59 } /* Literal.String.Other */
-.highlight .sr { color: #a67f59 } /* Literal.String.Regex */
-.highlight .s1 { color: #a67f59 } /* Literal.String.Single */
-.highlight .ss { color: #a67f59 } /* Literal.String.Symbol */
-.highlight .vc { color: #0077aa } /* Name.Variable.Class */
-.highlight .vg { color: #0077aa } /* Name.Variable.Global */
-.highlight .vi { color: #0077aa } /* Name.Variable.Instance */
-.highlight .il { color: #000000 } /* Literal.Number.Integer.Long */