remove obsolete test

public/app/features/explore/Explore.tsx

@@ -144,7 +144,7 @@ export class Explore extends React.PureComponent<ExploreProps, ExploreState> {
     if (!datasourceSrv) {
       throw new Error('No datasource service passed as props.');
     }
-    const datasources = datasourceSrv.getExploreSources();
+    const datasources = Object['values'](datasourceSrv.getAll());
     const exploreDatasources = datasources.map(ds => ({
       value: ds.name,
       label: ds.name,

public/app/features/plugins/datasource_srv.ts

@@ -91,12 +91,6 @@ export class DatasourceSrv {
     return sources;
   }
 
-  getExploreSources() {
-    const { datasources } = config;
-    const es = Object.keys(datasources).map(name => datasources[name]);
-    return _.sortBy(es, ['name']);
-  }
-
   getMetricSources(options?) {
     const metricSources: DataSourceSelectItem[] = [];
 

public/app/features/plugins/specs/datasource_srv.test.ts

@@ -18,32 +18,6 @@ const templateSrv = {
 describe('datasource_srv', () => {
   const _datasourceSrv = new DatasourceSrv({}, {}, {}, templateSrv);
 
-  describe('when loading explore sources', () => {
-    beforeEach(() => {
-      config.datasources = {
-        explore1: {
-          name: 'explore1',
-          meta: { explore: true, metrics: true },
-        },
-        explore2: {
-          name: 'explore2',
-          meta: { explore: true, metrics: false },
-        },
-        nonExplore: {
-          name: 'nonExplore',
-          meta: { explore: false, metrics: true },
-        },
-      };
-    });
-
-    it('should return list of explore sources', () => {
-      const exploreSources = _datasourceSrv.getExploreSources();
-      expect(exploreSources.length).toBe(2);
-      expect(exploreSources[0].name).toBe('explore1');
-      expect(exploreSources[1].name).toBe('explore2');
-    });
-  });
-
   describe('when loading metric sources', () => {
     let metricSources;
     const unsortedDatasources = {