hybrid-array: remove `ByteArray` alias #1528

Job	Run time
build (1.41.0, thumbv7em-none-eabi)	16s
build (1.41.0, wasm32-unknown-unknown)	20s
build (stable, thumbv7em-none-eabi)	13s
build (stable, wasm32-unknown-unknown)	23s
test (1.41.0)	20s
test (stable)	19s
minimal-versions / minimal-versions	33s
	2m 24s

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