Remove useless lines.

src/Parser.purs

@@ -54,7 +54,7 @@ instance altParser :: Alt Parser where
     where
       p stream = case p1 stream of
         Nothing -> p2 stream
-        Just x -> Just x
+        right -> right
 
 instance plusParser :: Plus Parser where
   empty :: forall a. Parser a
@@ -62,7 +62,6 @@ instance plusParser :: Plus Parser where
 
 instance alternativeParser :: Alternative Parser
 
--- TODO: Control.Lazy instance
 instance lazyParser :: Lazy (Parser a) where
   defer f = Parser \str -> parse (f unit) str
 
@@ -158,12 +157,3 @@ integer = token int
 
 symbol :: String -> Parser String
 symbol xs = token (string xs)
-
--- TODO: try orElse
---try :: Parser a -> Parser a
---try p = Parser p'
---  where
---    p' = case parse p of
---           Nothing -> p
---           Just 
--- orElse, (<|>) :: Parser a -> Parser a -> Parser a