Remove MSC button that never worked

The MSC button was added, but never connected to anything.

Remove it for now, so it can be added later, once we implement the supporting MSP messages.

tabs/onboard_logging.html

@@ -152,7 +152,6 @@ <h3 data-i18n="dataflashSavingTitle"></h3>
                                     <div class="legend"></div>
                                 </li>
                             </ul><bbr />
-                            <a class="require-msc-ready regular-button onboardLoggingRebootMsc" href="#" i18n="cliMscBtn"></a>
                         </div>
                     </div>
                 </div>
@@ -164,4 +163,4 @@ <h3 data-i18n="dataflashSavingTitle"></h3>
             <a href="#" class="save-settings regular-button" data-i18n="blackboxButtonSave"></a>
         </div>
     </div>
-</div>
+</div>