Artifact conflict check: remove unnecessary check

Don't check for artifact conflicts if it's a null
build and the only change since the last build is
that some SkyKeys were deleted.

Deleting ConfiguredTargets can only ever resolve
and not create conflicts:
- if the last build had a conflict, then we'd
  re-check anyway, because that is the same case
  as when building (x y) is in conflict but then
  null-building just (x) is not, and we re-check
  solely on the basis of the last build having had
  conflicts.
- if the last build had no conflict, then deleting
  a CT won't change that.

This CL also adds a comment that explains why we
don't check in this case.

This is a follow-up to commit 044264ee7290292195d0980657469ac69ba280e0.

RELNOTES: none
PiperOrigin-RevId: 291111167
1 file changed
tree: 3d78c0641d4e3728714a026a3230ab197d9301c2
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEOWNERS
  15. combine_distfiles.py
  16. combine_distfiles_to_tar.sh
  17. compile.sh
  18. CONTRIBUTING.md
  19. CONTRIBUTORS
  20. distdir.bzl
  21. ISSUE_TEMPLATE.md
  22. LICENSE
  23. README.md
  24. WORKSPACE
README.md

Bazel

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