diff --git a/highlight2.py b/highlight2.py
index c01d9f9..bf66340 100644
--- a/highlight2.py
+++ b/highlight2.py
@@ -42,12 +42,5 @@ class Highlighter:
     def highlight(self, lines):
         self.tokens = [[] for l in lines]
         self.lexer.lex(lines, y=0, x=0)
-        y = 0
         for token in self.lexer:
-            assert y <= token.y, "oh no %d %d" % (y, token.y)
-            assert token.y < len(lines), "uh oh %d %d" % (token.y, len(lines))
             self.tokens[token.y].append(token)
-            y = token.y
-
-    def update(self):
-        pass