Revert "adding slot_index to impression_stats_daily"
Revert "adding slot_index to impression_stats_daily"

This reverts commit 71202d2f9e2cafa5bf8ef9e0c6a355a8d65d5c7a.

oyiptong/splice,mostlygeek/splice,mozilla/splice,mostlygeek/splice,ncloudioj/splice,ncloudioj/splice,oyiptong/splice,mozilla/splice,tkiethanom/splice,ncloudioj/splice,rlr/splice,oyiptong/splice,mostlygeek/splice,oyiptong/splice,tkiethanom/splice,rlr/splice,rlr/splice,mozilla/splice,rlr/splice,mozilla/splice,mostlygeek/splice,tkiethanom/splice,tkiethanom/splice,ncloudioj/splice