Revert "cluster/distribute: Rebalance should also verify free inodes"

This reverts commit 215fea41a96479312a5ab8783c13b30ab9fe00fa

Realized soon after merging, that this patch is actually useless.
Checking for inode utilization on dst relative to src is of no use
because dst is already storing linkfile and inode is already consumed
no matter what. We might as well perform the rebalance and save on an
inode on the src node.

Change-Id: I7b8b8d35d9063a710e1bee1c7c6c7739fcc45ad4
Reviewed-on: http://review.gluster.org/5960
Reviewed-by: Harshavardhana <harsha@harshavardhana.net>
Tested-by: Anand Avati <avati@redhat.com>