Unify doc-strings (remove type/rtype)

As this information is already provided in type hints and we don't need to maintain it in two places.

src/ifcopenshell-python/ifcopenshell/api/resource/add_resource_time.py

@@ -28,9 +28,7 @@ def add_resource_time(file: ifcopenshell.file, resource: ifcopenshell.entity_ins
     be used to calculate other parameters like resource utilisation.
 
     :param resource: The IfcConstructionResource to record time for.
-    :type resource: ifcopenshell.entity_instance
     :return: The newly created IfcResourceTime
-    :rtype: ifcopenshell.entity_instance
 
     Example:
 

src/ifcopenshell-python/ifcopenshell/api/resource/calculate_resource_work.py

@@ -51,9 +51,7 @@ def calculate_resource_work(file: ifcopenshell.file, resource: ifcopenshell.enti
 
     :param resource: The IfcConstructionResource that you want to calculate
         the work performed.
-    :type resource: ifcopenshell.entity_instance
     :return None:
-    :rtype: None:
     """
     if ifcopenshell.util.constraint.is_attribute_locked(resource, "Usage.ScheduleWork"):
         return