Update c/image after https://github.com/containers/image/pull/2408

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/go-openapi/swag/string_bytes.go

@@ -2,21 +2,7 @@ package swag
 
 import "unsafe"
 
-type internalString struct {
-	Data unsafe.Pointer
-	Len  int
-}
-
 // hackStringBytes returns the (unsafe) underlying bytes slice of a string.
-func hackStringBytes(str string) []byte {
-	p := (*internalString)(unsafe.Pointer(&str)).Data
-	return unsafe.Slice((*byte)(p), len(str))
-}
-
-/*
- * go1.20 version (for when go mod moves to a go1.20 requirement):
-
 func hackStringBytes(str string) []byte {
 	return unsafe.Slice(unsafe.StringData(str), len(str))
 }
-*/