fix(alerting): remove has no value condition

public/app/features/alerting/partials/alert_tab.html

@@ -67,13 +67,6 @@
             <label class="gf-form-label query-keyword" ng-show="conditionModel.evaluator.params.length === 2">TO</label>
 						<input class="gf-form-input max-width-7" type="number" ng-if="conditionModel.evaluator.params.length === 2" ng-model="conditionModel.evaluator.params[1]" ng-change="ctrl.evaluatorParamsChanged()"></input>
 					</div>
-					<gf-form-switch class="gf-form"
-                        label="OR NO VALUE"
-                        label-class="query-keyword"
-                        checked="dashboard.editable"
-                        >
-					</gf-form-switch>
-
 					<div class="gf-form">
 						<label class="gf-form-label">
 							<a class="pointer" tabindex="1" ng-click="ctrl.removeCondition($index)">