Remove fetchNodeDataFromBackend TODOs

I decided to keep fetchNodeDataFromOsm.
The case is editing AED multiple times in quick succession.
OpenAEDMap could be lagging behind compared to OSM.
Even if it's one minute of delay it's bad UX.

Fixes #207

src/osm.ts

@@ -5,7 +5,6 @@ import {
 
 // Example: UTC+01:00 -> 60
 function parseTimezoneOffset(timezoneOffset: string | undefined): number {
-	// TODO: remove check after fetching data from backend
 	if (timezoneOffset === undefined) return 0;
 	const sign = timezoneOffset[3] === "+" ? 1 : -1;
 	const hours = parseInt(timezoneOffset.slice(4, 6), 10);
@@ -20,6 +19,7 @@ export async function fetchNodeData(
 		.then((response) => response.json())
 		.then((response) => {
 			const node = response.elements[0];
+			// Note: data here can be either from OSM or from the backend
 			return {
 				osmId: node.id,
 				osmType: "node",
@@ -38,7 +38,6 @@ export async function fetchNodeData(
 		});
 }
 
-// TODO: remove after fixing https://github.com/openstreetmap-polska/openaedmap-backend/issues/53
 export async function fetchNodeDataFromOsm(
 	nodeId: string,
 ): Promise<DefibrillatorData | null> {