STORE: Clear a couple of TODOs that were there for the sake of SM2
STORE: Clear a couple of TODOs that were there for the sake of SM2

We now have decoder support for SM2, so the cheats that were in place
for the sake of lacking decoders aren't needed any more.

Fixes #12982

Reviewed-by: Shane Lontis <452ce16516ceed26291fe7de3f8b53540d83864e@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12986)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl