refactor: fold cache revalidation into the event dispatcher

app/javascript/dashboard/store/modules/agents.js

@@ -1,7 +1,6 @@
 import * as MutationHelpers from 'shared/helpers/vuex/mutationHelpers';
 import * as types from '../mutation-types';
 import AgentAPI from '../../api/agents';
-import { createCacheRevalidateAction } from '../utils/cacheRevalidate';
 
 export const state = {
   records: [],
@@ -52,10 +51,6 @@ export const actions = {
       commit(types.default.SET_AGENT_FETCHING_STATUS, false);
     }
   },
-  revalidate: createCacheRevalidateAction({
-    api: AgentAPI,
-    mutation: types.default.SET_AGENTS,
-  }),
   create: async ({ commit }, agentInfo) => {
     commit(types.default.SET_AGENT_CREATING_STATUS, true);
     try {