Remove color dispose in Ant ColorManager

It is not necessary anymore to call dispose on Colors since Bug 563018.

Change-Id: I1d2febd2bc257e469cfe952fcb8a3fb3cb8a8292

ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/ColorManager.java

diff --git a/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/ColorManager.java b/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/ColorManager.java
index 7e90647..450f146 100644
--- a/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/ColorManager.java
+++ b/ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/ColorManager.java
@@ -56,10 +56,4 @@
 		return color;
 	}
 
-	@Override
-	public void dispose() {
-		for (Color color : fColorTable.values()) {
-			color.dispose();
-		}
-	}
 }