Manipulation: simplification of manipulation wrappers

Since support for IE6-7 was dropped these wrappers no longer required

Ref 90d7cc1d
Ref gh-2002
Closes gh-2032

src/manipulation.js

@@ -47,9 +47,10 @@ var nodeNames = "abbr|article|aside|audio|bdi|canvas|data|datalist|" +
 	// We have to close these tags to support XHTML (#13200)
 	wrapMap = {
 		option: [ 1, "<select multiple='multiple'>", "</select>" ],
-		legend: [ 1, "<fieldset>", "</fieldset>" ],
-		area: [ 1, "<map>", "</map>" ],
+
+		// Support: IE8
 		param: [ 1, "<object>", "</object>" ],
+
 		thead: [ 1, "<table>", "</table>" ],
 		tr: [ 2, "<table><tbody>", "</tbody></table>" ],
 		col: [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ],