view: move tile size definition to MapLoader

We also remove the unneeded redrawPending flag.

src/view/MapLoader.ts

@@ -45,7 +45,7 @@ function mkTileMap(
 	gl: WebGLRenderingContext,
 	tiles: Map<string, HTMLImageElement>,
 ): TileMap {
-	const tileSize = MapView.tileSize;
+	const tileSize = 32;
 
 	const canvasDim = nextPowerOf2(Math.sqrt(tiles.size));
 	const canvasSize = canvasDim * tileSize;