Remove stranded support.js checks for oldIE.

src/support.js

@@ -21,25 +21,6 @@ jQuery.support = (function() {
 
 	a.style.cssText = "float:left;opacity:.5";
 	support = {
-		// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
-		getSetAttribute: div.className !== "t",
-
-		// IE strips leading whitespace when .innerHTML is used
-		leadingWhitespace: div.firstChild.nodeType === 3,
-
-		// Make sure that tbody elements aren't automatically inserted
-		// IE will insert them into empty tables
-		tbody: !div.getElementsByTagName("tbody").length,
-
-		// Make sure that link elements get serialized correctly by innerHTML
-		// This requires a wrapper element in IE
-		htmlSerialize: !!div.getElementsByTagName("link").length,
-
-		// Make sure that element opacity exists
-		// (IE uses filter instead)
-		// Use a regex to work around a WebKit issue. See #5145
-		opacity: /^0.5/.test( a.style.opacity ),
-
 		// Verify style float existence
 		// (IE uses styleFloat instead of cssFloat)
 		cssFloat: !!a.style.cssFloat,
@@ -51,10 +32,6 @@ jQuery.support = (function() {
 		// Support: IE9, IE10
 		optSelected: opt.selected,
 
-		// Makes sure cloning an html5 element does not cause problems
-		// Where outerHTML is undefined, this still works
-		html5Clone: document.createElement("nav").cloneNode( true ).outerHTML !== "<:nav></:nav>",
-
 		// jQuery.support.boxModel DEPRECATED in 1.8 since we don't support Quirks Mode
 		boxModel: document.compatMode === "CSS1Compat",