Remove 'Configure Git' step #404

Job	Run time
Alpine Linux	2m 17s
FreeBSD-x86_64 with rust stable	49s
Linux-x86_64 with rust stable	1m 10s
Linux-x86_64 (rustls-native-roots) with rust stable	1m 16s
Linux-x86_64 (native-tls) with rust stable	1m 28s
Linux-x86_64 (native-tls-vendored) with rust stable	2m 23s
Linux-aarch64 with rust stable	56s
Linux-arm with rust stable	1m 16s
Linux-i686 with rust stable	39s
Linux-powerpc with rust stable	37s
Linux-powerpc64 with rust stable	37s
Linux-powerpc64le with rust stable	37s
Linux-riscv64 with rust stable	48s
Linux-s390x with rust stable	46s
NetBSD-x86_64 with rust stable	1m 47s
Windows-aarch64 with rust stable	1m 33s
Windows-i686 with rust stable	1m 33s
Windows-x86_64 with rust stable	2m 35s
macOS-x86_64 with rust stable	1m 25s
macOS-aarch64 with rust stable	1m 7s
Linux-x86_64 with rust beta	1m 9s
Linux-x86_64 with rust nightly	1m 24s
	28m 12s

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