Disabling worksharing by detaching and discarding worksets is reserved for the regular version of Revit.
Adding it to LT would allow the conversion of file-based central models into Revit Cloud Models (non-workshared) by people who received the central model and cannot use it in the cloud without asking someone with the regular version of Revit to resave the file.
Revit LT can open workshared files by creating a copy of the model, adding _LT to the file name, and editing them in a limited way, but it can't save them as non-workshared. When a central model is opened in LT, save as Cloud Model is disabled.