Closed
Description
We've been meaning to stop sending these, let's finally stop sending them. No longer reporting them will help w/ the issue outlined in #613.
Let's consider emitting a metric for these instead if it's not too difficult.
lock_for_write can emit these in a different manner than the typical way they're emitted (due to Spanner returning an ABORTED). If we do a metric, we could optionally also track these different types separately (via a metric tag): but this is just a nice to have.