Cleaned up some unused files (OHIF-54)

Packages/worklist/server/services/remote/instances.js

@@ -1,3 +1,5 @@
+import { remoteGetValue } from '../../lib/remoteGetValue';
+
 /**
  * Parses data returned from a QIDO search and transforms it into
  * an array of series that are present in the study

Packages/worklist/server/services/remote/retrieveMetadata.js

@@ -1,3 +1,5 @@
+import { remoteGetValue } from '../../lib/remoteGetValue';
+
 /**
  * Parses the SourceImageSequence, if it exists, in order
  * to return a ReferenceSOPInstanceUID. The ReferenceSOPInstanceUID

Packages/worklist/server/services/remote/studies.js

@@ -1,3 +1,5 @@
+import { remoteGetValue } from '../../lib/remoteGetValue';
+
 function resultDataToStudies(resultData) {
   var studies = [];