Remove the old parser code

Thus introducing a few functional regressions, but it's going to be
easier to fix things up without the old code knocking around and
getting in the way.

core/modules/parsers/wikiparser/rules/commentinline.js

@@ -0,0 +1,35 @@
+/*\
+title: $:/core/modules/parsers/wikiparser/rules/commentinline.js
+type: application/javascript
+module-type: wikirule
+
+Wiki text inline rule for HTML comments. For example:
+
+```
+<!-- This is a comment -->
+```
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+exports.name = "commentinline";
+exports.types = {inline: true};
+
+exports.init = function(parser) {
+	this.parser = parser;
+	// Regexp to match - HTML comment regexp by Stephen Ostermiller, http://ostermiller.org/findhtmlcomment.html
+	this.matchRegExp = /\<![ \r\n\t]*(?:--(?:[^\-]|[\r\n]|-[^\-])*--[ \r\n\t]*)\>/mg;
+};
+
+exports.parse = function() {
+	// Move past the match
+	this.parser.pos = this.matchRegExp.lastIndex;
+	// Don't return any elements
+	return [];
+};
+
+})();