Drop the comment on the custom map style branch

Review feedback: the branch already reads as "use the custom url as it
is", so the explanation belongs in the commit rather than the source.

features/location/api/src/main/kotlin/io/element/android/features/location/api/internal/MapTilerTileServerStyleUriBuilder.kt

@@ -33,10 +33,6 @@ internal class MapTilerTileServerStyleUriBuilder(
             val mapId = if (darkMode) darkMapId else lightMapId
             "$baseUrl/$mapId/style.json?key=$apiKey"
         } else {
-            // A custom style url comes from the homeserver .well-known and is expected to be complete:
-            // it already carries the operator's own credentials, if any. Appending our api key to it
-            // adds a second query string and breaks the request.
-            // See https://github.com/element-hq/element-x-android/issues/7289
             customMapStyleUrl
         }
     }