chore(license): removes modified boilerplate from license file

LICENSE

@@ -181,28 +181,3 @@ deem waived or otherwise exclude such Section(s) of the License, but only in
 their entirety and only with respect to the Combined Software.
 
 END OF LLVM EXCEPTION
-
-APPENDIX: How to apply the Apache License to your work.
-
-To apply the Apache License to your work, attach the following boilerplate
-notice, with the fields enclosed by brackets "[]" replaced with your own
-identifying information. (Don't include the brackets!)  The text should be
-enclosed in the appropriate comment syntax for the file format. We also
-recommend that a file or class name and description of purpose be included on
-the same "printed page" as the copyright notice for easier identification
-within third-party archives.
-
-Copyright 2021 DFINITY Foundation
-
-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.
-
-END OF APPENDIX