fix(auth): Remove unneeded auth helper identity link case
fix(auth): Remove unneeded auth helper identity link case

This was specific to an early SAM implementation where the identity was
not requested at setup. The setup goes through the entire Auth flow now.

Introduced in 2b4c870c0800d8867077df56178538809d128327
looker/sentry,mvaled/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,looker/sentry,gencer/sentry,gencer/sentry,ifduyue/sentry,gencer/sentry,ifduyue/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,looker/sentry,looker/sentry,gencer/sentry,ifduyue/sentry,ifduyue/sentry,beeftornado/sentry,gencer/sentry,ifduyue/sentry,mvaled/sentry,looker/sentry