Finding and omitting duplicate pairs across mutiple rows

I have an issue where I am trying to remove duplicate set pairs from a table.

I initially have a table "role", with the following data in it:

r1id| r2id
---+-----
1 | 2
1 | 3
2 | 1
2 | 3
3 | 1
3 | 2

The data in this table is a set {r1id, r2id}; This means that 1, 2 and 2, 1 are logically equivalent(and so forth).

so what I am trying to do is remove the duplicates
{2,1} {3,1} {3,2}

Anyone have any idea how to go about this? I have been banging my head on the table for a day trying to figure this out.

Any help would be really appreciated

Never mind... I have the answer and its stupidly simple

select *
from role
where r1id < r2id