My understanding is that there are two parts to this suit: patent infringement and trade secrets. You can't patent a trade secret (then it wouldn't be secret), so these are two independent things.

Alsup was suggesting Waymo to drop the patent portion of their suit and focus solely on the trade secret portion of their case. The trade secrets were pared down as mentioned in that snippet, but that's in addition to dropping 3 of the 4 patent infringement claims.