This was a nifty test, but remove it.

This was a nifty test, but remove it.

It wouldn't really test anything that doesn't already have a more
targeted test:
`yaml2obj-elf-section-basic.yaml`:
  Already tests that section content is correctly passed though.
`yaml2obj-elf-symbol-basic.yaml` (this file):
  Tests that the st_value and st_size attributes of `main` are set
  correctly.
Between those two tests, disassembling the file doesn't really add
anything, so just remove mention of disassembling the file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184607 91177308-0d34-0410-b5e6-96231b3b80d8