bulkstat_unlink_test_modified: Remove extraneous if statement

bulkstat_unlink_test_modified: Remove extraneous if statement

Fixes the following compiler warning:

bulkstat_unlink_test_modified.c:171:26: warning: equality comparison
with extraneous parentheses [-Wparentheses-equality]
                    if ((ret[i].bs_ino == inodelist[j])) {
                         ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>