The "last fetched" state for the `PhishingController` has been deleted
to force an immediate full update of the phishing configuration state.
We're doing this because the state was cleared in v10.34.2 because the
format of that state had changed.
This has been implemented in migration 92. The previous migration 92
has been renamed to 93 because it won't be included until a future
release. We need the migrations to remain sequential, and this will
save us from having to resolve a complex conflict when releasing this.
