xlators/nfs: nfs3.c - remove dead assignments.
xlators/nfs: nfs3.c - remove dead assignments.

Removed dead assignments and unused variables reported by clang.

One of the reports uncovers a minor bug in gnfs.
> Dead store  Dead assignment  xlators/nfs/server/src/nfs3.c  2860  1

A separate bug is logged for the above report and assigned to Shehjar.

Signed-off-by: Sachidananda Urs <sac@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 1114 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1114

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster