nfsv3: remove unnecessary call of Inode#toString for logging

the call of Inode#toString for logging is redundant, especially when
logger is disabled.

Acked-by: Lea Morschel
Acked-by: Paul Millar
Target: master
1 job for master in 1 minute and 23 seconds (queued for 14 seconds)
Status Name Job ID Coverage
  Build
passed build #24412

00:01:23