On 1/27/20, the nnbd specification changed weak and strong mode instance checks
to make them behave uniformly across legacy and opted-in libraries.
Therefore, it is not necessary anymore to propagate the library mode in
generated code to the runtime.
Change-Id: I42d3ddc6e9a921899aeac21be6374c7893a6d27c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/138111
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Régis Crelier <regis@google.com>
Régis Crelier
5701c4fd3b