[kernel] Remove @deprecated annotation
[kernel] Remove @deprecated annotation

Change-Id: I86b651978768b164e66b83ee319b226c106ae2d4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/163203
Reviewed-by: Clement Skau <495593248b6158163719b90dde8357b589c8e5d0@google.com>
Commit-Queue: Johnni Winther <0f64ef784d57ffb064b634040f9eeba0d33d0be4@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk