Replace generic UE event log with explicit INFO log including UE ID and RNTI
when removing a UE context and centralize access to UE fields via a local
pointer.
rrc_delete_ue_data removes the all the list in the UE context, including the
serving cells, and therefore the cell id should not be logged in the function
responsible for the removal of the UE context, which at this point is already
emptied and while the cells themselves are still there (in the DU/global cell
structures), the lists in the UE context are empty.
Guido Casati
4c56c6b2de