Support custom data processing during import

Summary: Per title, this allows for pre-processing data after it is deserialized and before it is stored in the plugin

Reviewed By: nikoant

Differential Revision: D26126423

fbshipit-source-id: bc08a6ab205d2a0d551515563cd85a197595ddb2

desktop/app/src/utils/exportData.tsx

@@ -329,7 +329,6 @@ async function addSaltToDeviceSerial({
   selectedPlugins,
   pluginStates2,
   devicePluginStates,
-  idler,
 }: AddSaltToDeviceSerialOptions): Promise<ExportType> {
   const {serial} = device;
   const newSerial = salt + '-' + serial;