To delete a library feature:
Open the library file (*.sldalprt or *.sldalasm).
Locate the load/restraint item you want to remove from the library.
Right-click the item and select Remove from Library.
You also remove a library feature by deleting
the corresponding load/restraint item.
Adding Analysis Library Features to a Document
Creating Analysis Library Features
Editing Analysis Library Features
References and Values with Analysis Library Features