Remove in_*_root_store columns from certificate table

[jvehent]

Unless I'm mistaken, those columns are not used anymore, in favor of the trust table. Can we remove them from the schema entirely?

[0xdiba]

I can see in the code that it is currently used.
If we can get something out of them is another story though.

These fields are only used in root CA certs and their only use would be if we want an
easy and quick way to see the certificates that are currently in any given truststore.
If we don't have a use case for that I think they can go.

[jvehent]

Haaa, now that makes sense. I misunderstood the meaning of the column, but it seems logical that it would indicate presence in the trust store.