Remove `anyio` Git builds from tests #6934

Job	Run time
Determine changes	5s
cargo clippy \| ubuntu	56s
cargo clippy \| windows	1m 27s
cargo fmt	33s
build binary \| linux	2m 7s
build binary \| macos aarch64	1m 13s
build binary \| windows	1m 57s
build binary \| macos x86_64	1m 46s
cargo shear	25s
cargo test \| ubuntu	4m 21s
cargo test \| windows	5m 0s
check windows trampoline	2m 33s
cargo test \| macos	4m 44s
benchmarks	4m 52s
ecosystem test \| prefecthq/prefect	1m 56s
check cache \| ubuntu	53s
ecosystem test \| pallets/flask	11s
integration test \| conda on ubuntu	36s
check system \| python on debian	40s
check system \| python on fedora	28s
check system \| python on ubuntu	17s
check system \| python on opensuse	35s
check system \| pypy on ubuntu	24s
check system \| pyston	3m 50s
check system \| python on rocky linux 8	31s
check system \| alpine	29s
check system \| python on rocky linux 9	1m 36s
check system \| amazonlinux	24s
check system \| python via pyenv	1m 49s
check system \| python on macos x86_64	22s
check cache \| macos aarch64	11s
check system \| homebrew python on macos aarch64	18s
check system \| python on macos aarch64	16s
check system \| python3.10 on windows	57s
check system \| python3.12 via chocolatey	1m 16s
check system \| python3.13 on windows	1m 34s
check system \| python3.10 on windows x86	1m 20s
check system \| conda3.8 on linux	48s
check system \| conda3.11 on linux	50s
check system \| conda3.8 on windows	1m 48s
check system \| conda3.11 on windows	2m 3s
check system \| conda3.8 on macos	53s
check system \| conda3.11 on macos	46s
check system \| embedded python3.10 on windows	29s
	1h 0m 29s

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