delete: don't ignore error
delete: don't ignore error

If "delete --filter XXX" is used and grn_table_delete_by_id() returns no
GRN_SUCCESS rc, the rc is ignored without this change.

kenhys/groonga,groonga/groonga,cosmo0920/groonga,kenhys/groonga,naoa/groonga,kenhys/groonga,cosmo0920/groonga,groonga/groonga,groonga/groonga,komainu8/groonga,komainu8/groonga,naoa/groonga,komainu8/groonga,cosmo0920/groonga,komainu8/groonga,komainu8/groonga,groonga/groonga,cosmo0920/groonga,cosmo0920/groonga,groonga/groonga,komainu8/groonga,cosmo0920/groonga,cosmo0920/groonga,komainu8/groonga,groonga/groonga,naoa/groonga,komainu8/groonga,naoa/groonga,kenhys/groonga,kenhys/groonga,groonga/groonga,naoa/groonga,naoa/groonga,kenhys/groonga,kenhys/groonga,cosmo0920/groonga,naoa/groonga,groonga/groonga,kenhys/groonga,naoa/groonga