Remove unused `StyleData` #88

Job	Run time
cargo clippy (windows-latest)	2m 0s
cargo check (msrv) (windows-latest)	1m 44s
cargo check (msrv) (android) (armv7-linux-androideabi)	45s
cargo clippy (android) (armv7-linux-androideabi)	55s
cargo check (msrv) (macos-14)	49s
cargo check (msrv) (android) (aarch64-linux-android)	39s
cargo clippy (macos-14)	1m 42s
cargo clippy (android) (aarch64-linux-android)	50s
cargo check (msrv) (android) (x86_64-linux-android)	42s
cargo check (msrv) (ubuntu-latest)	41s
cargo clippy (ubuntu-latest)	54s
cargo clippy (android) (x86_64-linux-android)	51s
cargo doc (windows-latest)	1m 16s
cargo fmt	20s
cargo doc (macos-14)	57s
cargo test (windows-latest)	1m 55s
cargo doc (ubuntu-latest)	29s
cargo test (macos-14)	37s
cargo test (ubuntu-latest)	31s
	18m 37s

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