Remove the alerts field from rule

ui/src/kapacitor/reducers/rules.js

@@ -16,7 +16,6 @@ export default function rules(state = {}, action) {
           trigger: 'threshold',
           values: defaultRuleConfigs.threshold,
           message: '',
-          alerts: [],
           alertNodes: [],
           every: null,
           name: 'Untitled Rule',
@@ -77,16 +76,6 @@ export default function rules(state = {}, action) {
       })
     }
 
-    case 'UPDATE_RULE_ALERTS': {
-      const {ruleID, alerts} = action.payload
-      const culledalerts = alerts.map(a => a.type)
-      return Object.assign({}, state, {
-        [ruleID]: Object.assign({}, state[ruleID], {
-          alerts: culledalerts,
-        }),
-      })
-    }
-
     case 'UPDATE_RULE_ALERT_NODES': {
       const {ruleID, alerts} = action.payload
       const alertNodesByType = {}