// CutPrefix returns s without the provided leading prefix byte slice
// and reports whether it found the prefix.
// If s doesn't start with prefix, CutPrefix returns s, false.
// If prefix is the empty byte slice, CutPrefix returns s, true.
//
// CutPrefix returns slices of the original slice s, not copies.
func CutPrefix(s, prefix []byte) (after []byte, found bool) {
	if !HasPrefix(s, prefix) {
		return s, false
	}