remotefilelog: remove unused import
This is no longer used since
a4c19a162615.
Differential Revision: https://phab.mercurial-scm.org/D10152
wireprotov1peer: don't raise internal errors in some cases
Specifically, when the peer is closed in the middle of a batch of rpcs.
Differential Revision: https://phab.mercurial-scm.org/D10074