Revert "Add support for prefixed nullable type"

This reverts commit 7720689931c2eb579afe8ffbfba036854a243e24.

Reason for revert: Breaks parsing less common conditionals (e.g. b ? c = true : g();)

Original change's description:
> Add support for prefixed nullable type
> 
> This adds support for nullable types of the form
> 
> <identifier> '.' <identifier> '?'
> 
> and
> 
> <identifier> '.' <identifier> '?' 'Function' '(' ...
> 
> This is an increment CL in the ongoing effort to add nullable type support
> as outlined in https://github.com/dart-lang/language/issues/110
> 
> Change-Id: I526aecbe64bacbd442cea0b4c52d36ff23b0443b
> Reviewed-on: https://dart-review.googlesource.com/c/87083
> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
> Commit-Queue: Dan Rubel <danrubel@google.com>

TBR=brianwilkerson@google.com,danrubel@google.com

Change-Id: Ib5e74b4aad239f561a33eae9d95dffa2693037f7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/87282
Reviewed-by: Dan Rubel <danrubel@google.com>
Commit-Queue: Dan Rubel <danrubel@google.com>
4 files changed
tree: 39bdeac90f846fd8a4d4c2f411e4432f3ecd63e7
  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. dartdoc_options.yaml
  28. DEPS
  29. LICENSE
  30. PATENTS
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. WATCHLISTS
README.md

Dart

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