Remove the duplicate Version class

We had two different com.google.gerrit.common.Version classes which
meant that under the GWT debug environment the server didn't have
access to its own version number.

Fix that by using ClientVersion from within the GWT UI, and leave
the real Version name for the rest of the runtime.

Change-Id: I3b5af1a866fb1b4a6dbe25269962fe80d8d26436
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-common/src/main/java/com/google/gerrit/common/ClientVersion.java

@@ -0,0 +1,24 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.common;
+
+import com.google.gwt.resources.client.ClientBundle;
+import com.google.gwt.resources.client.TextResource;
+
+public interface ClientVersion extends ClientBundle {
+  /** Version number of this client software build. */
+  @Source("Version")
+  TextResource version();
+}