Remove deprecated method

Author: natanfelles

src/Database.php

@@ -318,20 +318,6 @@ public function close() : bool
         return $closed;
     }
 
-    /**
-     * Pings the server, or tries to reconnect if the connection has gone down.
-     *
-     * @return bool
-     *
-     * @deprecated
-     *
-     * @codeCoverageIgnore
-     */
-    public function ping() : bool
-    {
-        return $this->mysqli->ping();
-    }
-
     /**
      * Closes the current and opens a new connection with the last config.
      *