check: Remove redundant _test_mount in check

check: Remove redundant _test_mount in check

init_rc already does a _test_mount. Hence removing the additional
_test_mount call when OLD_TEST_FS_MOUNT_OPTS != TEST_FS_MOUNT_OPTS.

Signed-off-by: Nirjhar Roy (IBM) <nirjhar.roy.lists@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>