(delete_temp_file): Use Fdelete_file.

src/callproc.c

@@ -467,7 +467,9 @@ static Lisp_Object
 delete_temp_file (name)
      Lisp_Object name;
 {
-  unlink (XSTRING (name)->data);
+  /* Use Fdelete_file because that runs a file name handler.
+     We did that when writing the file, so we should do so when deleting.  */
+  Fdelete_file (name);
 }
 
 DEFUN ("call-process-region", Fcall_process_region, Scall_process_region,