Revert copyright changes from files that didn't change in PR #1138

Job	Run time
telemetry-setup	4s
check-nightly-ci	10s
changed-files / Check changed files	11s
checks / check-style	1m 51s
checks / other-checks	45s
conda-cpp-build	0s
wheel-build-distributed-ucxx	0s
devcontainer	0s
wheel-build-libucxx	0s
conda-python-tests	0s
conda-cpp-tests	0s
conda-python-distributed-tests	0s
docs-build	0s
wheel-build-ucxx	0s
wheel-tests-ucxx	0s
wheel-tests-distributed-ucxx	0s
pr-builder / run	1s
telemetry-summarize	19s
	3m 21s

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