Revert "Move the JavaScript constant system into constants/constant_system.dart"

This reverts commit 1702b986c8bd9ba09dc24685f4483e4544986a6e.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Move the JavaScript constant system into constants/constant_system.dart
> in preparation to merge it with the base constant system and flatten the
> constant system hierarchy.
> 
> Change-Id: I6ef27b210515140d4516336fea015f74c8a0cd6a
> Reviewed-on: https://dart-review.googlesource.com/c/93840
> Reviewed-by: Sigmund Cherem <sigmund@google.com>
> Reviewed-by: Johnni Winther <johnniwinther@google.com>

TBR=johnniwinther@google.com,sigmund@google.com,fishythefish@google.com

Change-Id: If1b6291508c9792a6135a2ad5333b4bb3b800f69
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/94103
Reviewed-by: Mayank Patke <fishythefish@google.com>
Commit-Queue: Mayank Patke <fishythefish@google.com>
13 files changed
tree: 92315f47239c78047f62af722301dbdd1277fb84
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. PATENTS
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. WATCHLISTS
README.md

Dart

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Using Dart

Visit the dartlang.org to learn more about the language, tools, getting started, and more.

Browse pub.dartlang.org for more packages and libraries contributed by the community and the Dart team.

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents on our wiki.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

License & patents

See LICENSE and PATENTS.