Fix linting issues

public/app/features/dashboard/dashgrid/PanelHeader/PanelHeaderCorner.tsx

@@ -7,7 +7,6 @@ import { getLocationSrv } from '@grafana/runtime';
 import { PanelModel } from 'app/features/dashboard/state/PanelModel';
 import templateSrv from 'app/features/templating/template_srv';
 import { getTimeSrv, TimeSrv } from 'app/features/dashboard/services/TimeSrv';
-import { InspectTab } from '../../components/Inspector/PanelInspector';
 
 enum InfoMode {
   Error = 'Error',

public/app/plugins/datasource/elasticsearch/datasource.test.ts

@@ -625,6 +625,7 @@ describe('ElasticDatasource', function(this: any) {
             timeField: '@time',
           },
         } as DataSourceInstanceSettings<ElasticsearchOptions>,
+        backendSrv as BackendSrv,
         templateSrv as TemplateSrv,
         timeSrv as TimeSrv
       );

public/app/plugins/datasource/elasticsearch/elastic_response.ts

@@ -479,7 +479,7 @@ const flattenHits = (hits: Doc[]): { docs: Array<Record<string, any>>; propNames
   const docs: any[] = [];
   // We keep a list of all props so that we can create all the fields in the dataFrame, this can lead
   // to wide sparse dataframes in case the scheme is different per document.
-  let propNames: string[] = [];
+  const propNames: string[] = [];
 
   for (const hit of hits) {
     const flattened = hit._source ? flatten(hit._source, null) : {};