git-utils: deleted unused functions #6614

Job	Run time
Split workflow (macos-latest, linked)	1m 17s
Split workflow (macos-latest, default)	1m 36s
Split workflow (ubuntu-latest, linked)	1m 7s
Split workflow (ubuntu-latest, default)	1m 10s
Split workflow (macos-latest, nightly-latest)	1m 14s
Split workflow (ubuntu-latest, nightly-latest)	1m 9s
	7m 33s

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