Revert "Extend orphan-inodes timeout."

This reverts commit 138c7c6b49.

The timeout value here is still exceeded by CI test jobs, and thus
causing the test to fail.

Signed-off-by: Auke Kok <auke.kok@versity.com>

tests/tests/orphan-inodes.sh

@@ -70,15 +70,7 @@ done
 # wait for orphan scans to run
 t_set_all_sysfs_mount_options orphan_scan_delay_ms 1000
 # also have to wait for delayed log merge work from mount
-C=120
-while (( C-- )); do
-	brk=1
-	for ino in $inos; do
-		inode_exists $ino && brk=0
-	done
-	test $brk -eq 1 && break
-	sleep 1
-done
+sleep 15
 for ino in $inos; do
 	inode_exists $ino && echo "$ino still exists"
 done