remove attributions from tools/utils makefiles.

llvm-svn: 45414
diff --git a/llvm/tools/llvm-extract/Makefile b/llvm/tools/llvm-extract/Makefile
index fafa1cb..21fe37b 100644
--- a/llvm/tools/llvm-extract/Makefile
+++ b/llvm/tools/llvm-extract/Makefile
@@ -2,8 +2,8 @@
 # 
 #                     The LLVM Compiler Infrastructure
 #
-# This file was developed by the LLVM research group and is distributed under
-# the University of Illinois Open Source License. See LICENSE.TXT for details.
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
 # 
 ##===----------------------------------------------------------------------===##