chore: remove unused TILE_ATTR constant

frontend/src/lib/map.ts

@@ -17,8 +17,6 @@ export interface MarkerOptions {
 }
 
 const TILE_URL = 'https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png'
-const TILE_ATTR = '&copy; <a href="https://www.openstreetmap.org/copyright">OSM</a>, &copy; <a href="https://carto.com/">CARTO</a>'
-
 const MARKER_COLORS: Record<string, string> = {
   place: '#3b82f6',
   studio: '#a855f7',