[note from paultag - this may be due to the whole double-vote thing in Texas, we may not have the contentious vote, and only have the unanimous vote]
304 of 1351 bills with no votes listed in legislator_votes. All votes were in the upper chamber.
Example vote_id: TXV00000005, where all 31 legislators voted yea.
I checked a few more, all appear to be unanimous upper chamber votes