[3/5] fixing release notes name

[ke...@apache.org]

http://git-wip-us.apache.org/repos/asf/incubator-cloudstack/blob/d55a6339/docs/en-US/release-notes.ent
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diff --git a/docs/en-US/release-notes.ent b/docs/en-US/release-notes.ent
deleted file mode 100644
index 7858ad5..0000000
--- a/docs/en-US/release-notes.ent
+++ /dev/null
@@ -1,22 +0,0 @@
-<!-- Licensed to the Apache Software Foundation (ASF) under one
-      or more contributor license agreements.  See the NOTICE file
- distributed with this work for additional information
- regarding copyright ownership.  The ASF licenses this file
- to you 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.
--->
-
-<!ENTITY PRODUCT "CloudStack">
-<!ENTITY BOOKID "Technical Documentation">
-<!ENTITY YEAR "2012">
-<!ENTITY HOLDER "Apache Software Foundation">