Delete file so db_load doesn't run incrementally.

Delete file so db_load doesn't run incrementally.

It turns out that db_load incrementally updates the database (instead
of writing a new one).  Remove the old database to force db_load to
write a new one.

This also ensures that we handle write failure gracefully.

Cherry picked from commit 67493bfca44d436143d825b155bf2bc38990ea82
and backported to stable-1.10 branch.