Paul Berry
64cfdb4cc6
substitute4 was only used by the kernel resynthesizer, which is not being maintained at the moment (and which I believe needs to be reworked anyhow). With substitute4 gone, _explicitTypeParameters was always null (except in the case of CircularFunctionTypeImpl, where it had no effect), so we can just replace it with literal `null`. Change-Id: I5248e0f93b9a39c55d3e4e8b62150536656608e8 Reviewed-on: https://dart-review.googlesource.com/57709 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>