chore: Clean up unused files, imports, and work on getting end-to-end tests and unit tests running (#2272)

platform/core/src/DataSources/IWebApiDataSource.js

@@ -1,4 +1,4 @@
-import { DicomMetadataStore } from '@ohif/core';
+import { DicomMetadataStore } from '../services/DicomMetadataStore';
 // TODO: Use above to inject so dependent datasources don't need to import or
 // depend on @ohif/core?