Ben Clayton 91da97d6c3 Remove ast::NullLiteral
This isn't in the WGSL spec, nor is it generated by readers.
This was only used inside the SPIR-V writer, but this remaining usage was removed in the parent change.

Change-Id: I1bbfde67dc760b761af010a7a144dccb52369148
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/45343
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
2021-03-22 16:06:35 +00:00
..
2021-03-22 16:06:35 +00:00
2021-03-15 10:43:11 +00:00
2021-03-17 18:49:03 +00:00
2021-01-18 15:51:13 +00:00