When using the "Measure" Tool with Gizmos turned off, trying to delete
anything will result in an error message instead. When Gizmos are on
then view3d_ruler_remove_invoke will return OPERATOR_PASS_THROUGH if
no rulers are selected. This way you can delete other objects. But if
Gizmos are off then it returns OPERATOR_CANCELLED which stops in its
tracks. Return OPERATOR_PASS_THROUGH in this case instead.
Pull Request: https://projects.blender.org/blender/blender/pulls/131340
3f91350d4e