chore(display): doesnt seem like this can fit in 32 bits, remove TODO

Author: ulahello

display/rendering/canvas.c

@@ -315,10 +315,6 @@ DEFN_RENDER(triangle)
 	//
 	// [1]: https://en.wikipedia.org/wiki/Barycentric_coordinate_system
 
-	// TODO: there may be nice mathy properties that prove these
-	// always fit in 32 bits, but for now i'm using 64 bit
-	// integers, which surely fit.
-
 	const int64_t det = ((int64_t)tri.y1 - (int64_t)tri.y2) *
 		((int64_t)tri.x0 - (int64_t)tri.x2) +
 	    ((int64_t)tri.x2 - (int64_t)tri.x1) *