Remove unneeded comments

src/main.rs

@@ -1,8 +1,3 @@
-// This is based on example 3, but adds in highlighting visible tiles.
-//
-// Comments that duplicate previous examples have been removed for brevity.
-//////////////////////////////////////////////////////////////
-
 rltk::add_wasm_support!();
 mod crypto;
 mod map;
@@ -11,7 +6,6 @@ use map::TileType;
 use rltk::prelude::*;
 use std::collections::HashMap;
 
-// Just like example 3, but we're adding an additional vector: visible
 struct State {
     view: Chunk,
     loaded_chunks: Box<HashMap<(i32, i32), Chunk>>,