[Support] Remove {Bits,Float,Double}To{Bits,Float,Double}

These functions have been deprecated since:

  commit 0f52c1f8
  Author: Kazu Hirata <kazu@google.com>
  Date:   Tue Feb 14 09:52:36 2023 -0800

Differential Revision: https://reviews.llvm.org/D152110