Revert "Fix bogus interaction between code cache and instrumentation."

hits a DCHECK when testing libcore:
    art F 11973 12675 art/runtime/jit/jit_code_cache.cc:644] Check failed: it.second->GetProfilingInfo(sizeof(void*)) != nullptr 


This reverts commit e9924b7d4fcafe7261233d2c16ebb73d7bb5e8e8.

Change-Id: I37d05991b9506a53a7c76738a7e4a6def1010958
2 files changed