Remove obsolete update_copyright_headers.sh script

Closes gh-35142

update_copyright_headers.sh

@@ -1,16 +0,0 @@
-#!/bin/sh
-#
-# This shell script updates the copyright headers in source code files
-# in the current branch so that the headers conform to the pattern:
-# <start-year>-present.
-# 
-# For example, "Copyright 2002-2025" will be replaced with
-# "Copyright 2002-current".
-#
-# This has only been tested on mac OS.
-
-echo Updating copyright headers in Java, Kotlin, and Groovy source code
-
-for file in $(find -E . -type f -regex '.+\.(java|kt|groovy)$' | uniq); do
-	sed -i '' -E "s/Copyright ([0-9]{4})-[0-9]{4}/Copyright \1-present/g" $file;
-done