auth: Remove useless try-catch block
auth: Remove useless try-catch block

This looks to have been a typo in the original porting work.

avikivity/scylla,avikivity/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla