[webgpu-headers] Removes macros for "count" fields.

github.com/webgpu-native/webgpu-headers/issues/193

Change-Id: Id007ada8be9039c59fd775308635d50b66d365d1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/765136
Auto-Submit: Loko Kung <lokokung@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
1 file changed