Revert "add ICU license"

This reverts commit 1f228eff515c6200d1f6ab70471223fc7d78de69.

Author: abhina-sree

llvm/lib/Support/CharSet.cpp

@@ -12,46 +12,6 @@
 ///
 //===----------------------------------------------------------------------===//
 
-// UNICODE LICENSE V3
-//
-// COPYRIGHT AND PERMISSION NOTICE
-//
-// Copyright © 2016-2024 Unicode, Inc.
-//
-// NOTICE TO USER: Carefully read the following legal agreement. BY
-// DOWNLOADING, INSTALLING, COPYING OR OTHERWISE USING DATA FILES, AND/OR
-// SOFTWARE, YOU UNEQUIVOCALLY ACCEPT, AND AGREE TO BE BOUND BY, ALL OF THE
-// TERMS AND CONDITIONS OF THIS AGREEMENT. IF YOU DO NOT AGREE, DO NOT
-// DOWNLOAD, INSTALL, COPY, DISTRIBUTE OR USE THE DATA FILES OR SOFTWARE.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of data files and any associated documentation (the "Data Files") or
-// software and any associated documentation (the "Software") to deal in the
-// Data Files or Software without restriction, including without limitation
-// the rights to use, copy, modify, merge, publish, distribute, and/or sell
-// copies of the Data Files or Software, and to permit persons to whom the
-// Data Files or Software are furnished to do so, provided that either (a)
-// this copyright and permission notice appear with all copies of the Data
-// Files or Software, or (b) this copyright and permission notice appear in
-// associated Documentation.
-//
-// THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
-// KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
-// THIRD PARTY RIGHTS.
-//
-// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE
-// BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES,
-// OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-// WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-// ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE DATA
-// FILES OR SOFTWARE.
-
-// Except as contained in this notice, the name of a copyright holder shall
-// not be used in advertising or otherwise to promote the sale, use or other
-// dealings in these Data Files or Software without prior written
-// authorization of the copyright holder.
-
 #include "llvm/Support/CharSet.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"