Revert "[llvm-cov] Look up object files using debuginfod"
This reverts commit
efbc8bb18eda63007216ad0cb5a8de04963eddd5.
This change is causing failures when detecting curl on several build bots:
- https://lab.llvm.org/buildbot/#/builders/247/builds/884
- https://lab.llvm.org/buildbot/#/builders/231/builds/7688
- https://lab.llvm.org/buildbot/#/builders/121/builds/27389
- https://lab.llvm.org/buildbot/#/builders/230/builds/8464
- https://lab.llvm.org/buildbot/#/builders/57/builds/24209
- https://lab.llvm.org/buildbot/#/builders/127/builds/42722