Add on demand feature views deletion (feast-dev#2203)

Signed-off-by: corentinmarek <corentin.marek@gmail.com>

sdk/python/feast/registry.py

@@ -667,6 +667,18 @@ def delete_feature_view(self, name: str, project: str, commit: bool = True):
                     self.commit()
                 return
 
+        for idx, existing_on_demand_feature_view_proto in enumerate(
+            self.cached_registry_proto.on_demand_feature_views
+        ):
+            if (
+                existing_on_demand_feature_view_proto.spec.name == name
+                and existing_on_demand_feature_view_proto.spec.project == project
+            ):
+                del self.cached_registry_proto.on_demand_feature_views[idx]
+                if commit:
+                    self.commit()
+                return
+
         raise FeatureViewNotFoundException(name, project)
 
     def delete_entity(self, name: str, project: str, commit: bool = True):