Revert "Add a basic integration test for C++ smart pointers"

This reverts commit 73786631984289b3d601034b2bf4ba2b8f5845eb.

Revert r339961 since its causing debuginfo-tests to fail:
http://green.lab.llvm.org/green/job/clang-stage1-configure-RA/48514/

rdar://problem/43449629

llvm-svn: 340119