Remove an unnecessary else branch (#662) #543

Job	Run time
minrust	2m 38s
miri	8m 0s
loom	2m 48s
nightly	3m 40s
cross (i686-unknown-linux-gnu)	25s
rustfmt	2s
cross (armv7-unknown-linux-gnueabihf)	30s
stable (ubuntu-latest)	1m 8s
cross (powerpc-unknown-linux-gnu)	31s
tsan	3m 4s
stable (macos-latest)	2m 25s
cross (powerpc64-unknown-linux-gnu)	27s
stable (windows-latest)	2m 49s
cross (wasm32-unknown-unknown)	5s
Publish Documentation	2m 32s
	31m 4s

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