Remove forever-alone regexps in event.js

These should have been removed during the event refactor.

src/event.js

@@ -1,10 +1,6 @@
 (function( jQuery ) {
 
-var rnamespaces = /\.(.*)$/,
-	rformElems = /^(?:textarea|input|select)$/i,
-	rperiod = /\./g,
-	rspaces = / /g,
-	rescape = /[^\w\s.|`]/g,
+var rformElems = /^(?:textarea|input|select)$/i,
 	rtypenamespace = /^([^\.]*)?(?:\.(.+))?$/,
 	rhoverHack = /\bhover(\.\S+)?/,
 	rkeyEvent = /^key/,