selftests: remove the LSM_ID_IMA check in lsm/lsm_list_modules_test

The IMA LSM ID token was removed as IMA isn't yet a proper LSM, but
we forgot to remove the check from the selftest.

Reported-by: kernel test robot <yujie.liu@intel.com>
Closes: https://lore.kernel.org/r/202311221047.a9Dww3vY-lkp@intel.com/


Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>