Refs #23919 -- Removed obsolete __ne__() methods.

__ne__() defaults to the opposite of __eq__() on Python 3
when it doesn't return NotImplemented.

django/db/__init__.py

@@ -41,9 +41,6 @@ class DefaultConnectionProxy(object):
     def __eq__(self, other):
         return connections[DEFAULT_DB_ALIAS] == other
 
-    def __ne__(self, other):
-        return connections[DEFAULT_DB_ALIAS] != other
-
 
 connection = DefaultConnectionProxy()
 

django/db/migrations/migration.py

@@ -62,9 +62,6 @@ class Migration(object):
             return False
         return (self.name == other.name) and (self.app_label == other.app_label)
 
-    def __ne__(self, other):
-        return not (self == other)
-
     def __repr__(self):
         return "<Migration %s.%s>" % (self.app_label, self.name)
 

django/db/migrations/state.py

@@ -233,9 +233,6 @@ class ProjectState(object):
             return False
         return all(model == other.models[key] for key, model in self.models.items())
 
-    def __ne__(self, other):
-        return not (self == other)
-
 
 class AppConfigStub(AppConfig):
     """
@@ -626,6 +623,3 @@ class ModelState(object):
             (self.bases == other.bases) and
             (self.managers == other.managers)
         )
-
-    def __ne__(self, other):
-        return not (self == other)

django/db/models/base.py

@@ -520,9 +520,6 @@ class Model(metaclass=ModelBase):
             return self is other
         return my_pk == other._get_pk_val()
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
     def __hash__(self):
         if self._get_pk_val() is None:
             raise TypeError("Model instances without primary key value are unhashable")

django/db/models/fields/files.py

@@ -28,9 +28,6 @@ class FieldFile(File):
             return self.name == other.name
         return self.name == other
 
-    def __ne__(self, other):
-        return not self.__eq__(other)
-
     def __hash__(self):
         return hash(self.name)
 

django/db/models/indexes.py

@@ -117,6 +117,3 @@ class Index(object):
 
     def __eq__(self, other):
         return (self.__class__ == other.__class__) and (self.deconstruct() == other.deconstruct())
-
-    def __ne__(self, other):
-        return not (self == other)

django/db/models/manager.py

@@ -160,9 +160,6 @@ class BaseManager(object):
             self._constructor_args == other._constructor_args
         )
 
-    def __ne__(self, other):
-        return not (self == other)
-
     def __hash__(self):
         return id(self)