pyloxi: remove 'skip' field from Member

The other member types catch the ones that would previously set this flag.

The type fields of instructions, action_ids, etc still aren't populated.
diff --git a/py_gen/codegen.py b/py_gen/codegen.py
index 2221e5a..7b6aa37 100644
--- a/py_gen/codegen.py
+++ b/py_gen/codegen.py
@@ -35,7 +35,7 @@
 
 OFClass = namedtuple('OFClass', ['name', 'pyname', 'members', 'type_members',
                                  'min_length', 'is_fixed_length'])
-Member = namedtuple('Member', ['name', 'oftype', 'offset', 'skip'])
+Member = namedtuple('Member', ['name', 'oftype', 'offset'])
 LengthMember = namedtuple('LengthMember', ['name', 'oftype', 'offset'])
 FieldLengthMember = namedtuple('FieldLengthMember', ['name', 'oftype', 'offset', 'field_name'])
 TypeMember = namedtuple('TypeMember', ['name', 'oftype', 'offset', 'value'])
@@ -146,8 +146,7 @@
             else:
                 members.append(Member(name=member['name'],
                                       oftype=oftype.OFType(member['m_type'], version),
-                                      offset=member['offset'],
-                                      skip=member['name'] in of_g.skip_members))
+                                      offset=member['offset']))
 
         ofclasses.append(
             OFClass(name=cls,