cull (someone or something) out of (something)
To remove someone or something from a group. We were so determined to win the science bowl that we culled everyone who seemed susceptible to stage fright out of the team.
cull someone or something out of something
and cull someone or something outto eliminate someone or something from a group. We will cull the older pigeons out from the flock. They culled out the slower runners from the team.