Resolve TODO in ResolveQuerySet validation

The unavailable queries are allowed in ResolveQuerySet and resolved to
0s, which has been fixed in
https://dawn-review.googlesource.com/c/dawn/+/48320.

BUG: dawn:434
Change-Id: I72b1f0b621fc22a7a0d30c407c7359e59d7b905c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/53762
Reviewed-by: Jiawei Shao <jiawei.shao@intel.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/dawn_native/CommandEncoder.cpp

@@ -399,9 +399,6 @@ namespace dawn_native {
                     "set");
             }
 
-            // TODO(crbug.com/dawn/434): Validate that the queries between [firstQuery, firstQuery +
-            // queryCount - 1] must be available(written by query operations).
-
             // The destinationOffset must be a multiple of 8 bytes on D3D12 and Vulkan
             if (destinationOffset % 8 != 0) {
                 return DAWN_VALIDATION_ERROR(