Revert "[llvm-objdump] Re-commit r367284."

This reverts r367776 (git commit d3409992).
My changes to llvm-objdump tests caused them to fail on windows:
http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/27368

llvm-svn: 367816