build

style: remove unneeded lifetimes from trait implementations #121

Job	Run time
Build jj-lib without Git support	43s
Check protos	24s
cargo-deny (advisories)	25s
build (ubuntu-latest)	4m 43s
cargo-deny (bans licenses sources)	25s
build (macos-13)	7m 5s
Clippy check	2m 32s
Check that MkDocs can build the docs	19s
build (macos-14)	4m 37s
Check that MkDocs can build the docs with Poetry 1.8	21s
build (windows-latest)	10m 32s
Check formatting	15s
build (ubuntu-latest, --all-features)	5m 47s
	38m 8s

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