Try to enable added test for every browser

Author: HeikoKlare

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_browser_Browser.java

@@ -2989,7 +2989,6 @@ public Object function(Object[] arguments) {
  */
 @Test
 public void test_BrowserFunction_availableOnLoad_concurrentInstances_issue20() {
-	assumeTrue(isEdge, "Race condition is specific to async Edge/WebView2 implementation");
 	AtomicBoolean browser1FuncAvailable = new AtomicBoolean(false);
 	AtomicBoolean browser2FuncAvailable = new AtomicBoolean(false);