Remove the unused implicit attribute `_cc_toolchains`. (#3116)

CC toolchains are gathered from the line:
```
toolchains = use_cc_toolchains(),
```

Keep toolchain usage of _cc_toolchain with a TODO to remove it.

See #3115 for details.
11 files changed
tree: 8128dbe008ae000353232b5291ce443d6bcac1f4
  1. .bazelci/
  2. .bcr/
  3. .github/
  4. cargo/
  5. crate_universe/
  6. docs/
  7. examples/
  8. extensions/
  9. ffi/
  10. nix/
  11. rust/
  12. test/
  13. tools/
  14. util/
  15. .bazelignore
  16. .bazelrc
  17. .bazelversion
  18. .clang-format
  19. .clippy.toml
  20. .envrc
  21. .gitattributes
  22. .gitignore
  23. .prettierrc.toml
  24. .rustfmt.toml
  25. ARCHITECTURE.md
  26. AUTHORS
  27. BUILD.bazel
  28. CODEOWNERS
  29. COMPATIBILITY.md
  30. CONTRIBUTING.md
  31. CONTRIBUTORS
  32. LICENSE.txt
  33. MODULE.bazel
  34. README.md
  35. version.bzl
  36. WORKSPACE.bazel
  37. WORKSPACE.bzlmod
README.md

Rust Rules

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Overview

This repository provides rules for building Rust projects with Bazel.

Community

General discussions and announcements take place in the GitHub Discussions, but there are additional places where community members gather to discuss rules_rust.

Documentation

Please refer to the full documentation.