internal/bytealg: remove duplicate go:build line

Change-Id: I6b71bf468b9544820829f02e320673f5edd785fa
GitHub-Last-Rev: 8082ac5
GitHub-Pull-Request: #46683
Reviewed-on: https://go-review.googlesource.com/c/go/+/326730
Reviewed-by: Ian Lance Taylor <[email protected]>
Trust: Tobias Klauser <[email protected]>

Author: cuishuang

src/internal/bytealg/index_generic.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
 //go:build !amd64 && !arm64 && !s390x && !ppc64le && !ppc64
 // +build !amd64,!arm64,!s390x,!ppc64le,!ppc64
 

src/internal/bytealg/index_native.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// go:build amd64 || arm64 || s390x || ppc64le || ppc64
 //go:build amd64 || arm64 || s390x || ppc64le || ppc64
 // +build amd64 arm64 s390x ppc64le ppc64