Remove deprecated Treeish interface

This interface has been deprecated for a long time now.
Time to remove it.

Change-Id: I29a938657e4637b2a9d0561940b38d70866613f7
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/DirCacheCheckoutTest.java

@@ -65,7 +65,7 @@ public class DirCacheCheckoutTest extends ReadTreeTest {
 			throws IllegalStateException, IOException {
 		DirCache dc = db.lockDirCache();
 		try {
-			dco = new DirCacheCheckout(db, head.getTreeId(), dc, merge.getTreeId());
+			dco = new DirCacheCheckout(db, head.getId(), dc, merge.getId());
 			dco.preScanTwoTrees();
 		} finally {
 			dc.unlock();
@@ -76,7 +76,7 @@ public class DirCacheCheckoutTest extends ReadTreeTest {
 	public void checkout() throws IOException {
 		DirCache dc = db.lockDirCache();
 		try {
-			dco = new DirCacheCheckout(db, theHead.getTreeId(), dc, theMerge.getTreeId());
+			dco = new DirCacheCheckout(db, theHead.getId(), dc, theMerge.getId());
 			dco.checkout();
 		} finally {
 			dc.unlock();

org.eclipse.jgit.test/tst/org/eclipse/jgit/lib/T0002_TreeTest.java

@@ -126,7 +126,6 @@ public class T0002_TreeTest extends SampleDataRepositoryTestCase {
 		assertTrue("entries is empty", t.members().length == 0);
 		assertEquals("full name is empty", "", t.getFullName());
 		assertTrue("no id", t.getId() == null);
-		assertTrue("tree is self", t.getTree() == t);
 		assertTrue("database is r", t.getRepository() == db);
 		assertTrue("no foo child", t.findTreeMember("foo") == null);
 		assertTrue("no foo child", t.findBlobMember("foo") == null);
@@ -178,7 +177,6 @@ public class T0002_TreeTest extends SampleDataRepositoryTestCase {
 		assertTrue("isLoaded", f.isLoaded());
 		assertFalse("has items", f.members().length > 0);
 		assertFalse("is root", f.isRoot());
-		assertTrue("tree is self", f.getTree() == f);
 		assertTrue("parent is modified", t.isModified());
 		assertTrue("parent has no id", t.getId() == null);
 		assertTrue("found bob child", t.findTreeMember(f.getName()) == f);

org.eclipse.jgit/src/org/eclipse/jgit/lib/GitIndex.java

@@ -1006,7 +1006,7 @@ public class GitIndex {
 					current = trees.peek();
 			}
 			inserter.flush();
-			return current.getTreeId();
+			return current.getId();
 		} finally {
 			inserter.release();
 		}

org.eclipse.jgit/src/org/eclipse/jgit/lib/Tree.java

@@ -65,7 +65,7 @@ import org.eclipse.jgit.util.RawParseUtils;
  * information from its getter methods.
  */
 @Deprecated
-public class Tree extends TreeEntry implements Treeish {
+public class Tree extends TreeEntry {
 	private static final TreeEntry[] EMPTY_TREE = {};
 
 	/**
@@ -235,14 +235,6 @@ public class Tree extends TreeEntry implements Treeish {
 		return db;
 	}
 
-	public final ObjectId getTreeId() {
-		return getId();
-	}
-
-	public final Tree getTree() {
-		return this;
-	}
-
 	/**
 	 * @return true of the data of this Tree is loaded
 	 */

org.eclipse.jgit/src/org/eclipse/jgit/lib/Treeish.java

@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2006-2007, Shawn O. Pearce <spearce@spearce.org>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- *   copyright notice, this list of conditions and the following
- *   disclaimer in the documentation and/or other materials provided
- *   with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- *   names of its contributors may be used to endorse or promote
- *   products derived from this software without specific prior
- *   written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package org.eclipse.jgit.lib;
-
-import java.io.IOException;
-
-/**
- * Tree-ish is an interface for tree-like Git objects.
- *
- * @deprecated Use {@link org.eclipse.jgit.revwalk.RevWalk} to parse objects
- * and resolve to a {@link org.eclipse.jgit.revwalk.RevTree}.  See the method
- * {@link org.eclipse.jgit.revwalk.RevWalk#parseTree(AnyObjectId)}.
- */
-@Deprecated
-public interface Treeish {
-	/**
-	 * @return the id of this tree
-	 */
-	public ObjectId getTreeId();
-
-	/**
-	 * @return the tree of this tree-ish object
-	 * @throws IOException
-	 */
-	public Tree getTree() throws IOException;
-}