update copyright year and remove requirements.txt

Author: bkhouri

Utilities/helpers.py

@@ -3,7 +3,7 @@
 ##
 ## This source file is part of the Swift open source project
 ##
-## Copyright (c) 2014-2020 Apple Inc. and the Swift project authors
+## Copyright (c) 2014-2025 Apple Inc. and the Swift project authors
 ## Licensed under Apache License v2.0 with Runtime Library Exception
 ##
 ## See http://swift.org/LICENSE.txt for license information