Delete these two tests. They are specific to x86-64, and there's no

Delete these two tests. They are specific to x86-64, and there's no
reliable way to do this with the current dejagnu infrastructure.
If someone can figure out how to fix these tests so that they test
what they are intended to test without spuriously failing on any
popular platforms, they are invited to reinstate them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63592 91177308-0d34-0410-b5e6-96231b3b80d8