diff --git a/py_gen/codegen.py b/py_gen/codegen.py
index 44b4814..9c32e7f 100644
--- a/py_gen/codegen.py
+++ b/py_gen/codegen.py
@@ -118,9 +118,6 @@
                          ofclasses=modules_by_version[version]['meter_band'],
                          version=version)
 
-def generate_pp(out, name, version):
-    util.render_template(out, 'pp.py')
-
 def generate_util(out, name, version):
     util.render_template(out, 'util.py', version=version)
 
diff --git a/py_gen/tests/generic_util.py b/py_gen/tests/generic_util.py
index 8b2f59f..03885a2 100644
--- a/py_gen/tests/generic_util.py
+++ b/py_gen/tests/generic_util.py
@@ -44,12 +44,6 @@
         self.assertEquals(['\x04abc', '\x03de', '\x02f', '\x01'], a)
 
 class TestOFReader(unittest.TestCase):
-    def test_empty(self):
-        reader = OFReader("")
-        self.assertEquals(str(reader.read('')), "")
-        with self.assertRaisesRegexp(loxi.ProtocolError, "Buffer too short"):
-            reader.read_buf(1)
-
     def test_simple(self):
         reader = OFReader("abcdefg")
         self.assertEquals(reader.read('2s')[0], "ab")
diff --git a/py_gen/util.py b/py_gen/util.py
index 2a0dc54..0d8c43f 100644
--- a/py_gen/util.py
+++ b/py_gen/util.py
@@ -41,18 +41,3 @@
 
 def render_static(out, name):
     template_utils.render_static(out, name, [templates_dir])
-
-def constant_for_value(version, group, value):
-    enums = loxi_globals.ir[version].enums
-    enum = [x for x in enums if x.name == group][0]
-    for name, value2 in enum.values:
-        if value == value2:
-            return "const." + name
-    return repr(value)
-
-def ancestors(ofclass):
-    r = []
-    while ofclass:
-        r.append(ofclass)
-        ofclass = ofclass.superclass
-    return r