OciDriver: do not use meta, driver is not meta-aware

Author: dg

src/Database/Drivers/OciDriver.php

@@ -164,7 +164,7 @@ public function getForeignKeys(string $table): array
 	 */
 	public function getColumnTypes(\PDOStatement $statement): array
 	{
-		return Nette\Database\Helpers::detectTypes($statement);
+		return [];
 	}