Removed snapshot from dashboard settings dropdown, its only reached through the share menu

src/app/partials/dashboard_topnav.html

@@ -40,7 +40,6 @@
 						<li><a class="pointer" ng-click="editJson();">View JSON</a></li>
 						<li><a class="pointer" ng-click="saveDashboardAs();">Save As...</a></li>
 						<li><a class="pointer" ng-click="deleteDashboard();">Delete dashboard</a></li>
-						<li><a class="pointer" ng-click="snapshot();">Snapshot dashboard</a></li>
 					</ul>
 				</li>
 			</ul>