afs_server: remove 3 dead assignments in LoopServers, move live one

afs_server: remove 3 dead assignments in LoopServers, move live one

The assignments to conns, rxconns, and conntimer are all dead, so
remove them.  The assignment to nconns is live, but rather far from
the for loop that actually uses it; move it to just before the loop.

Change-Id: I8daf642630cc2d468ba7db42de46b69cd88fac28
Reviewed-on: http://gerrit.openafs.org/7777
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>