Remove the need for setting `web_sys_unstable_apis` #12420

Job	Run time
android	25s
Check wasm32 + wasm-bindgen	2m 25s
cargo-deny aarch64-apple-darwin	41s
cargo-deny aarch64-linux-android	38s
Format + check + test	15m 45s
ios	1m 9s
cargo-deny i686-pc-windows-gnu	40s
Check Windows	1m 25s
cargo-deny i686-pc-windows-msvc	38s
cargo-deny i686-unknown-linux-gnu	37s
cargo-deny wasm32-unknown-unknown	40s
cargo-deny x86_64-apple-darwin	36s
cargo-deny x86_64-pc-windows-gnu	38s
cargo-deny x86_64-pc-windows-msvc	42s
cargo-deny x86_64-unknown-linux-gnu	38s
cargo-deny x86_64-unknown-linux-musl	38s
cargo-deny x86_64-unknown-redox	40s
	28m 55s

Provide feedback