git-utils: deleted unused functions #3484

Job	Run time
Resolve environment (windows-latest, default)	3m 21s
Resolve environment (macos-latest, nightly-latest)	2m 10s
Resolve environment (ubuntu-latest, default)	34s
Resolve environment (ubuntu-latest, nightly-latest)	34s
Resolve environment (macos-latest, linked)	1m 45s
Resolve environment (windows-latest, nightly-latest)	3m 6s
Resolve environment (macos-latest, default)	2m 31s
Resolve environment (windows-latest, linked)	3m 4s
Resolve environment (ubuntu-latest, linked)	33s
	17m 38s

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