Remove unnecessary condition on relstorage from gpload.

The condition listed all possible values of relstorage, except for
'f' for RELSTORAGE_FOREIGN. The condition on relkind filters out foreign
tables as well, so the condition on relstorage is redundant. (Although
I don't think filtering out foreign table was even the intention here.)

gpMgmt/bin/gpload.py

@@ -2367,7 +2367,6 @@ class gpload:
                         FROM pg_catalog.pg_class c
                             LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
                         WHERE c.relkind IN ('r','v','S','')
-                            AND c.relstorage IN ('h', 'a', 'c','x','v','')
                             AND n.nspname <> 'pg_catalog'
                             AND n.nspname <> 'information_schema'
                             AND n.nspname !~ '^pg_toast'