<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def kill_current_session(ctx: Context_T) -> None: """ Force kill current session of the given context, despite whether it is running or not. :param ctx: message context """

    ctx_id = context_id(ctx)
    if ctx_id in _sessions:
        del _sessions[ctx_id]