caps: utility function to diff capabilities has been moved to tp-python

1 files changed, 0 insertions, 25 deletions

diff --git a/butterfly/capabilities.py b/butterfly/capabilities.py
index ea919da..152cdb4 100644
--- a/butterfly/capabilities.py
+++ b/butterfly/capabilities.py
@@ -149,31 +149,6 @@ class ButterflyCapabilities(
             handle = self.ensure_contact_handle(contact)
             self._add_default_capabilities([handle])
 
-
-    def _diff_capabilities(self, handle, ctype, new_gen=None,
-            new_spec=None, added_gen=None, added_spec=None):
-
-        if handle in self._caps and ctype in self._caps[handle]:
-            old_gen, old_spec = self._caps[handle][ctype]
-        else:
-            old_gen = 0
-            old_spec = 0
-
-        if new_gen is None:
-            new_gen = old_gen
-        if new_spec is None:
-            new_spec = old_spec
-        if added_gen:
-            new_gen |= added_gen
-        if added_spec:
-            new_spec |= new_spec
-
-        if old_gen != new_gen or old_spec != new_spec:
-            diff = (int(handle), ctype, old_gen, new_gen, old_spec, new_spec)
-            return diff
-
-        return None
-
     def _add_default_capabilities(self, contacts_handles):
         """Add the default capabilities to these contacts."""
         ret = []