Remove workaround hyper first byte timeout #146

Job	Run time
build-macos	6m 21s
build-android (aarch64-linux-android)	2m 53s
build-android (armv7-linux-androideabi)	2m 53s
build-linux (x86_64-unknown-linux-gnu)	4m 1s
build-android (x86_64-linux-android)	3m 3s
build-linux-musl (x86_64-unknown-linux-musl)	5m 1s
build-linux (aarch64-unknown-linux-gnu)	4m 11s
build-windows (x86_64-pc-windows-msvc)	12m 3s
build-linux-musl (aarch64-unknown-linux-musl)	4m 53s
build-windows (i686-pc-windows-msvc)	11m 32s
build-linux (armv7-unknown-linux-gnueabihf)	4m 8s
build-linux-musl (armv7-unknown-linux-musleabihf)	4m 30s
	1h 5m 29s

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