diff --git a/core-signatures.txt b/core-signatures.txt
index 1b7c2301b1a..75ad3c07e9e 100644
--- a/core-signatures.txt
+++ b/core-signatures.txt
@@ -1,21 +1,3 @@
-#  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.
-
-# see Solr's DefaultSolrThreadFactory
-# see Lucene's NamedThreadFactory
-
 @defaultMessage spawns threads with vague names; use a custom thread factory and name threads so that you can tell (by its name) which executor it is associated with
 
 java.util.concurrent.Executors#newFixedThreadPool(int)