Revert "Revert "remove li_let_bind for wand""

This reverts commit f448aed5.
1 job for time/less-unfold in 11 minutes and 28 seconds (queued for 9 minutes and 40 seconds)
Status Name Job ID Coverage
  Build
passed build-coq.8.14.0-timing #159503
fp-timing

00:11:28