Revert "[InstCombine] fold bitcasts around an extractelement"

This reverts commit r255124.

Broke http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast/builds/4193/steps/test/logs/stdio

From: Mehdi Amini <mehdi.amini@apple.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255126 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed