Drop seemingly unnecessary Windows code handling

Author: Girgias

ext/dba/dba.c

@@ -660,27 +660,12 @@ static void php_dba_open(INTERNAL_FUNCTION_PARAMETERS, bool persistent)
 					 * when the lib opens the file it is already created
 					 */
 					file_mode = "r+b";       /* read & write, seek 0 */
-#ifdef PHP_WIN32
-					if (!need_creation) {
-						lock_file_mode = "r+b";
-					} else
-#endif
 					lock_file_mode = "a+b";  /* append */
 				} else {
-#ifdef PHP_WIN32
-					if (!need_creation) {
-						file_mode = "r+b";
-					} else
-#endif
 					file_mode = "a+b";       /* append */
 					lock_file_mode = "w+b";  /* create/truncate */
 				}
 			} else {
-#ifdef PHP_WIN32
-				if (!need_creation) {
-					file_mode = "r+b";
-				} else
-#endif
 				file_mode = "a+b";
 			}
 			/* In case of the 'a+b' append mode, the handler is responsible