[clang] [llvm] [Clang][CodeGen] Remove explicit insertion of AllocToken pass (PR #169360)

[via llvm-commits]

dyung wrote:

Hi @melver, one of the tests you added `clang/test/CodeGen/distributed-thin-lto/memprof-pgho.cpp` seems to be failing on a bot, can you take a look? (You might not have been notified since the bot was already failing with another test failure which has since been fixed)

https://lab.llvm.org/buildbot/#/builders/190/builds/31993

https://github.com/llvm/llvm-project/pull/169360