Update m_kkutu.html

Author: kdhkr

src/main/resources/templates/view/kkutu/m_kkutu.html

@@ -306,7 +306,6 @@ <h4 th:text="#{kkutu.dialog.room.room-title}"></h4>
             <div class="dialog-bar">
                 <h4 th:text="#{kkutu.dialog.room.password}"></h4>
                 <input id="room-pw" maxlength="24" th:placeholder="#{kkutu.dialog.room.password.placeholder}" type="password">
-                <input id="room-id" maxlength="20" style="width:1px;height:1px;">
             </div>
             <div class="dialog-bar">
                 <h4 th:text="#{kkutu.dialog.room.user-limit}"></h4>