Remove UITestCase

Nothing refers to it in eclipse.platform.releng.aggregator according to
my search.

Author: akurtakov

tests/org.eclipse.ui.tests.harness/src/org/eclipse/ui/tests/harness/util/TestRunLogUtil.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019 Paul Pazderski and others.
+ * Copyright (c) 2019, 2026 Paul Pazderski and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -25,7 +25,7 @@ public final class TestRunLogUtil {
 
 	/**
 	 * A {@link TestWatcher} to log test start and end. Should be added as @Rule in
-	 * every JUnit4 test class (which not already extends {@link UITestCase}) as
+	 * every JUnit4 test class as
 	 *
 	 * <pre>
 	 * &#64;Rule

tests/org.eclipse.ui.tests.harness/src/org/eclipse/ui/tests/harness/util/UITestCase.java

@@ -47,9 +47,6 @@ <h3>
 test case.&nbsp; Run the test code within that window and then close the
 test window in the tearDown method.&nbsp; The modified state will be discarded
 when the window is closed.
-<p>Additional Tips: The UITestCase class in org.eclipse.ui.tests.util can
-be used as a superclass for your test case.&nbsp; It provides useful methods
-for the creation of new windows, pages, etc, and their disposal.
 <p><b>Piercing the Encapsulation</b>
 <p>Scenario: To test the behavior of commands which modify the state of
 the object when there are no public interfaces to query that state.