Fix #1857. Fix bug where deleting from the outliner was not tracked.

src/blenderbim/test/bim/feature/geometry.feature

@@ -282,6 +282,10 @@ Scenario: Override delete - with active IFC data
     When I press "object.delete"
     Then the object "IfcWall/Cube" does not exist
 
+Scenario: Override outliner delete
+    Given an untestable scenario
+    Then nothing happens
+
 Scenario: Override duplicate move - without active IFC data
     Given an empty Blender session
     And I add a cube

src/blenderbim/test/bim/test_feature.py

@@ -40,6 +40,11 @@ def replace_variables(value):
     return value
 
 
+@given("an untestable scenario")
+def an_untestable_scenario():
+    pass
+
+
 @given("an empty Blender session")
 @when("an empty Blender session is started")
 def an_empty_ifc_project():