remove old alerting tests

src/test-setup/mocks.js

@@ -15,17 +15,11 @@ export let timeSrvMock = {
   timeRange: jest.fn().mockReturnValue({ from: '', to: '' })
 };
 
-export let zabbixAlertingSrvMock = {
-  setPanelAlertState: jest.fn(),
-  removeZabbixThreshold: jest.fn(),
-};
-
 const defaultExports = {
   templateSrvMock,
   backendSrvMock,
   datasourceSrvMock,
   timeSrvMock,
-  zabbixAlertingSrvMock
 };
 
 export default defaultExports;