Revert "[AArch64][FastISel] Add more truncation tests." and "[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types."

This reverts commit r243198 and 243304.

Turns out this wasn't the correct fix for this problem. It works only within
FastISel, but fails when the truncate is selected by SDAG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244287 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed