client: No longer upload session log
client: No longer upload session log

- No longer upload the session log at the end of a sync operation, since
this presents user privacy issues and serves no useful purpose

- No longer print green "Sync completed" message on "isr sync" if the
cache is clean; just print "Skipping upload and commit" message

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr