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/templates/message.py b/py_gen/templates/message.py
index 86fb3bf..d81d5b7 100644
--- a/py_gen/templates/message.py
+++ b/py_gen/templates/message.py
@@ -46,7 +46,7 @@
 
 :: for ofclass in ofclasses:
 :: from py_gen.codegen import Member, LengthMember, TypeMember
-:: normal_members = [m for m in ofclass.members if type(m) == Member and not m.skip]
+:: normal_members = [m for m in ofclass.members if type(m) == Member]
 :: type_members = [m for m in ofclass.members if type(m) == TypeMember]
 class ${ofclass.pyname}(Message):
 :: for m in type_members: