Move away of deprecated AbstractUIPlugin.getWorkbench.

PlatformUI.getWorkbench() is preferred.

Change-Id: Iff9712d3dac6c6e45ab7a14669cafb13a377bb21
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/AntUIPlugin.java b/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/AntUIPlugin.java
index 843741f..093221d 100644
--- a/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/AntUIPlugin.java
+++ b/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/AntUIPlugin.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2013 IBM Corporation and others.
+ * Copyright (c) 2000, 2019 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0