IC: Fix delete command.

src/Model/InitialConditions/InitialConditions.py

@@ -95,7 +95,7 @@ class InitialConditions(object):
     def delete(self, data):
         self._data = list(
             filter(
-                lambda x: x in data,
+                lambda x: x not in data,
                 self._data
             )
         )