Tests: Remove remaining obsolete jQuery.cache references

PR gh-4586 removed some of those but not all.

Closes gh-4715
Ref gh-4586

(cherry picked from commit d96111e)

test/data/testrunner.js

@@ -1,11 +1,11 @@
 ( function() {
 
-// Store the old counts so that we only assert on tests that have actually leaked,
+"use strict";
+
+// Store the old count so that we only assert on tests that have actually leaked,
 // instead of asserting every time a test has leaked sometime in the past
-var oldCacheLength = 0,
- oldActive = 0,
+var oldActive = 0,
 
- expectedDataKeys = {},
  splice = [].splice,
  ajaxSettings = jQuery.ajaxSettings;
 
@@ -24,11 +24,6 @@ QUnit.config.requireExpects = true;
  * teardown function on all modules' lifecycle object.
  */
 window.moduleTeardown = function( assert ) {
- var i, expectedKeys, actualKeys,
- cacheLength = 0;
-
- // Reset data register
- expectedDataKeys = {};
 
  // Check for (and clean up, if possible) incomplete animations/requests/etc.
  if ( jQuery.timers && jQuery.timers.length !== 0 ) {
@@ -45,19 +40,6 @@ window.moduleTeardown = function( assert ) {
  }
 
  Globals.cleanup();
-
- for ( i in jQuery.cache ) {
- ++cacheLength;
- }
-
- // Because QUnit doesn't have a mechanism for retrieving
- // the number of expected assertions for a test,
- // if we unconditionally assert any of these,
- // the test will fail with too many assertions :|
- if ( cacheLength !== oldCacheLength ) {
- assert.equal( cacheLength, oldCacheLength, "No unit tests leak memory in jQuery.cache" );
- oldCacheLength = cacheLength;
- }
 };
 
 QUnit.done( function() {

test/unit/wrap.js

@@ -21,7 +21,7 @@ function manipulationFunctionReturningObj( value ) {
 
 function testWrap( val, assert ) {
 
- assert.expect( 19 );
+ assert.expect( 18 );
 
  var defaultText, result, j, i, cacheLength;
 
@@ -68,12 +68,6 @@ function testWrap( val, assert ) {
  "Check node,textnode,comment wraps doesn't hurt text"
  );
 
- // Try wrapping a disconnected node
- cacheLength = 0;
- for ( i in jQuery.cache ) {
- cacheLength++;
- }
-
  j = jQuery( "<label></label>" ).wrap( val( "<li></li>" ) );
  assert.equal(
  j[ 0 ] .nodeName.toUpperCase(), "LABEL", "Element is a label"
@@ -82,13 +76,6 @@ function testWrap( val, assert ) {
  j[ 0 ].parentNode.nodeName.toUpperCase(), "LI", "Element has been wrapped"
  );
 
- for ( i in jQuery.cache ) {
- cacheLength--;
- }
- assert.equal(
- cacheLength, 0, "No memory leak in jQuery.cache (bug #7165)"
- );
-
  // Wrap an element containing a text node
  j = jQuery( "<span></span>" ).wrap( "<div>test</div>" );
  assert.equal(