lints: Enable `warn(unused_qualifications)` #43

Job	Run time
cargo check (msrv) (android) (armv7-linux-androideabi)	45s
cargo check (msrv) (windows-latest)	1m 21s
cargo clippy (android) (armv7-linux-androideabi)	49s
cargo check (msrv) (android) (aarch64-linux-android)	44s
cargo clippy (android) (aarch64-linux-android)	52s
cargo check (msrv) (android) (x86_64-linux-android)	43s
cargo clippy (android) (x86_64-linux-android)	47s
cargo doc (windows-latest)	1m 33s
cargo fmt	13s
cargo doc (macos-14)	36s
cargo doc (ubuntu-latest)	25s
cargo test (windows-latest)	1m 31s
cargo clippy (windows-latest)	43s
cargo check (msrv) (macos-14)	58s
cargo test (macos-14)	54s
cargo clippy (macos-14)	44s
cargo check (msrv) (ubuntu-latest)	44s
cargo test (ubuntu-latest)	35s
cargo clippy (ubuntu-latest)	34s
	15m 31s

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