simd: drop 2 unnecessary instructions #143

Job	Run time
Test stable on ubuntu-latest	1m 51s
Test stable on windows-latest	3m 5s
Test stable on macOS-latest	2m 0s
Test beta on ubuntu-latest	54s
Test beta on windows-latest	1m 24s
Test beta on macOS-latest	1m 36s
Test nightly on ubuntu-latest	1m 0s
Test nightly on windows-latest	1m 36s
Test nightly on macOS-latest	1m 39s
SIMD +sse4.2 on stable	1m 27s
SIMD +sse4.2 on stable	1m 47s
SIMD +avx2 on stable	1m 43s
SIMD +avx2 on stable	1m 27s
SIMD +sse4.2,+avx2 on stable	1m 29s
SIMD +sse4.2,+avx2 on stable	1m 33s
SIMD +sse4.2 on beta	44s
SIMD +sse4.2 on beta	54s
SIMD +avx2 on beta	45s
SIMD +avx2 on beta	1m 1s
SIMD +sse4.2,+avx2 on beta	47s
SIMD +sse4.2,+avx2 on beta	54s
SIMD +sse4.2 on nightly	44s
SIMD +sse4.2 on nightly	57s
SIMD +avx2 on nightly	53s
SIMD +avx2 on nightly	48s
SIMD +sse4.2,+avx2 on nightly	47s
SIMD +sse4.2,+avx2 on nightly	46s
Test aarch64 (neon)	1m 53s
Test with Miri	1m 39s
msrv	1m 1s
CI is green	0s
	39m 4s

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