all: replace unsafe slice operations with unsafe.Slice

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

gpu/internal/d3d11/d3d11_windows.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"image"
 	"math"
-	"reflect"
 	"unsafe"
 
 	"golang.org/x/sys/windows"
@@ -850,10 +849,5 @@ func toBlendFactor(f driver.BlendFactor) (uint32, uint32) {
 
 // sliceOf returns a slice from a (native) pointer.
 func sliceOf(ptr uintptr, cap int) []byte {
-	var data []byte
-	h := (*reflect.SliceHeader)(unsafe.Pointer(&data))
-	h.Data = ptr
-	h.Cap = cap
-	h.Len = cap
-	return data
+	return unsafe.Slice((*byte)(unsafe.Pointer(ptr)), cap)
 }