This reverts commit 8a21ab195a.
Reason for revert: Test failure: http://b/187227619
Original change's description:
> [VM/runtime] Refactor the representation of type parameters in the VM.
>
> This introduces a new VM internal class 'TypeParameters' representing the declaration of a list of type parameters, either in a class or function.
> The reference to (or use of) a type parameter is still represented by the existing 'TypeParameter' class.
>
> Fixes https://github.com/dart-lang/sdk/issues/43901
> Fixes https://github.com/dart-lang/sdk/issues/45763
>
> TEST=existing ones and a regression test
>
> Change-Id: I1fde808bf753cc1cb829f2c4383c1836651cee80
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/189942
> Commit-Queue: Régis Crelier <regis@google.com>
> Reviewed-by: Alexander Markov <alexmarkov@google.com>
TBR=rmacnak@google.com,alexmarkov@google.com,regis@google.com,sstrickl@google.com
Change-Id: If12caa1a84cb6d1c1b8225589f3c994d25abb120
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/198282
Reviewed-by: Michal Terepeta <michalt@google.com>
Reviewed-by: Tess Strickland <sstrickl@google.com>
Commit-Queue: Michal Terepeta <michalt@google.com>
c6bffaf19e