Look at the team's page listing the coaches. Akey, Barry, Clark and Fewell have all been removed. Manusky and Olivadotti remain listed.
Redskins.com | Coaches
So either they are candidates to ascend to DC, or Gruden is currently signaling he thinks highly enough to retain them, or the DC candidate Gruden has in mind has signaled that he likes those two and would keep them.