87d85db responders: remove checks that are handled inside cache_req

3 files Authored by pbrezina 7 years ago, Committed by lslebodn 7 years ago,
    responders: remove checks that are handled inside cache_req
    
    Those checks were redundant, since they are already part of cache_req.
    
    Resolves:
    https://fedorahosted.org/sssd/ticket/3151
    
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>