Replacing PouchDB indexes (used only to get the list of Gpxes by a custom implementation.

src/workers/dispatcher-worker.ts

@@ -5,7 +5,6 @@ import {
   putNewGpx,
   existsGpx,
   pruneAndSaveImportedGpx,
-  getGpxesForViewport,
   getGpx,
   getAllGpxes,
 } from '../db/gpx';
@@ -25,7 +24,6 @@ onmessage = async function (e) {
     existsGpx,
     pruneAndSaveImportedGpx,
     getAllGpxes,
-    getGpxesForViewport,
     getGpx,
     getTrk,
     getTrkseg,