Remove obsolete getRepositoryMethod from WorkingTreeIterator

The method was added for symlink support, but isn't needed anymore.
Since it was added for this release it's like it never existed.

Change-Id: I422cd1dcdfa40b25ba3d6e08b112159dae9a4353
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/treewalk/WorkingTreeIterator.java

@@ -206,15 +206,6 @@ public abstract class WorkingTreeIterator extends AbstractTreeIterator {
 		ignoreNode = new RootIgnoreNode(entry, repo);
 	}
 
-	/**
-	 * @return the repository this iterator works with
-	 *
-	 * @since 3.3
-	 */
-	public Repository getRepository() {
-		return repository;
-	}
-
 	/**
 	 * Define the matching {@link DirCacheIterator}, to optimize ObjectIds.
 	 *