(cloudwatch) refactor annotation query

public/app/plugins/datasource/cloudwatch/specs/datasource_specs.ts

@@ -187,59 +187,4 @@ describe('CloudWatchDatasource', function() {
       expect(scenario.request.data.action).to.be('ListMetrics');
     });
   });
-
-  describe('When performing annotationQuery', function() {
-    var parameter = {
-      annotation: {
-        region: 'us-east-1',
-        namespace: 'AWS/EC2',
-        metricName: 'CPUUtilization',
-        dimensions: {
-          InstanceId: 'i-12345678'
-        },
-        statistics: ['Average'],
-        period: 300
-      },
-      range: {
-        from: moment(1443438674760),
-        to: moment(1443460274760)
-      }
-    };
-    var alarmResponse = {
-      MetricAlarms: [
-        {
-          AlarmName: 'test_alarm_name'
-        }
-      ]
-    };
-    var historyResponse = {
-      AlarmHistoryItems: [
-        {
-          Timestamp: '2015-01-01T00:00:00.000Z',
-          HistoryItemType: 'StateUpdate',
-          AlarmName: 'test_alarm_name',
-          HistoryData: '{}',
-          HistorySummary: 'test_history_summary'
-        }
-      ]
-    };
-    beforeEach(function() {
-      ctx.backendSrv.datasourceRequest = function(params) {
-        switch (params.data.action) {
-        case 'DescribeAlarmsForMetric':
-          return ctx.$q.when({data: alarmResponse});
-        case 'DescribeAlarmHistory':
-          return ctx.$q.when({data: historyResponse});
-        }
-      };
-    });
-    it('should return annotation list', function(done) {
-      ctx.ds.annotationQuery(parameter).then(function(result) {
-        expect(result[0].title).to.be('test_alarm_name');
-        expect(result[0].text).to.be('test_history_summary');
-        done();
-      });
-      ctx.$rootScope.$apply();
-    });
-  });
 });