Remove unused code

tools/utils/unsafeutil_legacy.go

@@ -1,46 +0,0 @@
-// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
-//go:build !go1.20
-
-package utils
-
-import (
-	"unsafe"
-)
-
-// stringHeader is the runtime representation of a string.
-// It should be identical to reflect.StringHeader
-type stringHeader struct {
-	data      unsafe.Pointer
-	stringLen int
-}
-
-// sliceHeader is the runtime representation of a slice.
-// It should be identical to reflect.sliceHeader
-type sliceHeader struct {
-	data     unsafe.Pointer
-	sliceLen int
-	sliceCap int
-}
-
-// Unsafely converts s into a byte slice.
-// If you modify b, then s will also be modified. This violates the
-// property that strings are immutable.
-func UnsafeStringToBytes(s string) (b []byte) {
-	stringHeader := (*stringHeader)(unsafe.Pointer(&s))
-	sliceHeader := (*sliceHeader)(unsafe.Pointer(&b))
-	sliceHeader.data = stringHeader.data
-	sliceHeader.sliceLen = len(s)
-	sliceHeader.sliceCap = len(s)
-	return b
-}
-
-// Unsafely converts b into a string.
-// If you modify b, then s will also be modified. This violates the
-// property that strings are immutable.
-func UnsafeBytesToString(b []byte) (s string) {
-	sliceHeader := (*sliceHeader)(unsafe.Pointer(&b))
-	stringHeader := (*stringHeader)(unsafe.Pointer(&s))
-	stringHeader.data = sliceHeader.data
-	stringHeader.stringLen = len(b)
-	return s
-}