diff --git a/bin/pip-diff b/bin/pip-diff
index 9bc1b49..64b0937 100755
--- a/bin/pip-diff
+++ b/bin/pip-diff
@@ -25,11 +25,7 @@ def split(s):
 
     return s.split('!')
 
-
-# TODO: consider package upgrades.
-
 class Requirements(object):
-    """docstring for Requirements"""
     def __init__(self, reqfile=None):
         super(Requirements, self).__init__()
         self.path = reqfile
@@ -60,11 +56,6 @@ class Requirements(object):
                 self.requirements.append(requirement)
 
 
-        # assert that the given file exists
-        # parse the file
-        # insert those entries into self.declarations
-        pass
-
     def diff(self, requirements, ignore_versions=False):
         r1 = self
         r2 = requirements
@@ -101,7 +92,6 @@ class Requirements(object):
 
 
 def diff(r1, r2, include_fresh=False, include_stale=False):
-    # assert that r1 and r2 are files.
 
     include_versions = True if include_stale else False