Rust

Remove `Context::is_desktop` #38

Job	Run time
Format + check + test	2m 42s
Check wasm32 + wasm-bindgen	3m 41s
android	22s
cargo-deny aarch64-apple-darwin	40s
Check Windows	2m 21s
cargo-deny aarch64-linux-android	44s
cargo-deny i686-pc-windows-gnu	39s
cargo-deny i686-pc-windows-msvc	47s
cargo-deny i686-unknown-linux-gnu	1m 3s
cargo-deny wasm32-unknown-unknown	59s
cargo-deny x86_64-apple-darwin	41s
cargo-deny x86_64-pc-windows-gnu	44s
cargo-deny x86_64-pc-windows-msvc	56s
cargo-deny x86_64-unknown-linux-gnu	57s
cargo-deny x86_64-unknown-linux-musl	38s
cargo-deny x86_64-unknown-redox	52s
	18m 46s

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