Revert "AMDGPU/GlobalISel: Implement select for G_INSERT"

This reverts commit r344310.

The test case was failing on some bots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344317 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed