Remove support.reliableHiddenOffsets detect.

src/css.js

@@ -537,7 +537,7 @@ jQuery(function() {
 
 if ( jQuery.expr && jQuery.expr.filters ) {
 	jQuery.expr.filters.hidden = function( elem ) {
-		return ( elem.offsetWidth === 0 && elem.offsetHeight === 0 ) || (!jQuery.support.reliableHiddenOffsets && ((elem.style && elem.style.display) || jQuery.css( elem, "display" )) === "none");
+		return elem.offsetWidth === 0 && elem.offsetHeight === 0;
 	};
 
 	jQuery.expr.filters.visible = function( elem ) {

src/support.js

@@ -1,6 +1,6 @@
 jQuery.support = (function() {
 
-	var support, all, a, select, opt, input, fragment, eventName, isSupported, i,
+	var support, all, a, select, opt, input, fragment, eventName, i,
 		div = document.createElement("div");
 
 	// Setup
@@ -114,28 +114,8 @@ jQuery.support = (function() {
 		container = document.createElement("div");
 		container.style.cssText = "border:0;width:0;height:0;position:absolute;top:0;left:-9999px;margin-top:1px";
 
-		body.appendChild( container ).appendChild( div );
-
-		// Support: IE8
-		// Check if table cells still have offsetWidth/Height when they are set
-		// to display:none and there are still other visible table cells in a
-		// table row; if so, offsetWidth/Height are not reliable for use when
-		// determining if an element has been hidden directly using
-		// display:none (it is still safe to use offsets if a parent element is
-		// hidden; don safety goggles and see bug #4512 for more information).
-		div.innerHTML = "<table><tr><td></td><td>t</td></tr></table>";
-		tds = div.getElementsByTagName("td");
-		tds[ 0 ].style.cssText = "padding:0;margin:0;border:0;display:none";
-		isSupported = ( tds[ 0 ].offsetHeight === 0 );
-
-		tds[ 0 ].style.display = "";
-		tds[ 1 ].style.display = "none";
-
-		// Support: IE8
-		// Check if empty table cells still have offsetWidth/Height
-		support.reliableHiddenOffsets = isSupported && ( tds[ 0 ].offsetHeight === 0 );
-
 		// Check box-sizing and margin behavior
+		body.appendChild( container ).appendChild( div );
 		div.innerHTML = "";
 		div.style.cssText = "box-sizing:border-box;-moz-box-sizing:border-box;-webkit-box-sizing:border-box;padding:1px;border:1px;display:block;width:4px;margin-top:1%;position:absolute;top:1%;";
 		support.boxSizing = ( div.offsetWidth === 4 );