Remove the given LightGroup object from the set of LightGroup objects 
   Namespace:   Autodesk.Revit.DB.Lighting  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 22.0.0.0 (22.1.0.0) 
  Since:  2013 
Syntax
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Parameters
- groupId
-  Type:  Autodesk.Revit.DB ElementId  
 The Id of the LightGroup object to remove
Remarks
 Note that only the group is deleted, not the lights contained in the group The lights will still exist but will not be in a group any longer 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The given element Id does not correspond to a light group -or- The LightGroup is not contained by this LightGroupManager | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was null |