remove deprecated primitive type #493

Job	Run time
stable (ubuntu-latest)	2m 40s
stable (macos-latest)	3m 24s
loom	4m 15s
cross (i686-unknown-linux-gnu)	1m 45s
stable (windows-latest)	3m 41s
minrust	4m 4s
cross (armv7-unknown-linux-gnueabihf)	2m 7s
cross (powerpc-unknown-linux-gnu)	1m 44s
miri	13m 53s
nightly	7m 36s
rustfmt	16s
cross (powerpc64-unknown-linux-gnu)	1m 59s
tsan	4m 47s
cross (wasm32-unknown-unknown)	17s
Publish Documentation	0s
	52m 28s

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