Remove the ICE check for expression behaviors always being either `{Next}` or `{Next, Discard}`. Unreachable code may be result in something else.
Add the RemoveUnreachableStatements transform to the SPIR-V writer sanitizer transform list. The writer cannot correctly handle unreachable statements.
Bug: tint:1369
Bug: chromium:1285622
Change-Id: I9fa54c6d2096b1ee633dd551b628c7dd3ba64fb5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/76300
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>