Fix build without rustls #2281

Job	Run time
Docs	27s
Lint	16s
Test	41s
build_versions (stable)	22s
Test (charset)	53s
Test (cookies)	39s
Test	23s
Test (charset)	25s
Test (socks-proxy)	34s
cargo-deny (aarch64-apple-ios)	17s
Test (gzip)	36s
Test (cookies)	30s
build_versions (beta)	15s
cargo-deny (aarch64-linux-android)	16s
Test (brotli)	34s
Test (socks-proxy)	34s
build_versions (1.67.0)	19s
cargo-deny (i686-pc-windows-gnu)	16s
Test (json)	39s
Test (gzip)	25s
Test (native-tls)	41s
cargo-deny (i686-pc-windows-msvc)	19s
Test (brotli)	25s
cargo-deny (i686-unknown-linux-gnu)	18s
Test (json)	27s
cargo-deny (wasm32-unknown-unknown)	25s
Test (native-tls)	29s
cargo-deny (x86_64-apple-darwin)	16s
cargo-deny (x86_64-apple-ios)	18s
cargo-deny (x86_64-pc-windows-gnu)	18s
cargo-deny (x86_64-pc-windows-msvc)	16s
cargo-deny (x86_64-unknown-linux-gnu)	18s
cargo-deny (x86_64-unknown-redox)	17s
	14m 8s

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