internal/unsafe: get rid of GoString

The only users were GOOS=windows code, which can use
golang.org/x/sys/windows.BytePtrToString instead.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

internal/unsafe/unsafe.go

@@ -44,14 +44,3 @@ func SliceOf(s uintptr) []byte {
 	h.Len = 1 << 30
 	return res
 }
-
-// GoString convert a NUL-terminated C string
-// to a Go string.
-func GoString(s []byte) string {
-	for i, v := range s {
-		if v == 0 {
-			return string(s[:i])
-		}
-	}
-	return string(s)
-}

internal/unsafe/unsafe_test.go

@@ -1,20 +0,0 @@
-// SPDX-License-Identifier: Unlicense OR MIT
-
-package unsafe
-
-import (
-	"testing"
-)
-
-func TestGoString(t *testing.T) {
-	tests := [][2]string{
-		{"Hello\x00", "Hello"},
-		{"\x00", ""},
-	}
-	for _, test := range tests {
-		got := GoString([]byte(test[0]))
-		if exp := test[1]; exp != got {
-			t.Errorf("expected %q got %q", exp, got)
-		}
-	}
-}