[webgpu-headers] Removes macros for count field renames.

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

Change-Id: I79e7cb8cf23b4322edc7aed8951791718f025fee
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/155802
Auto-Submit: Loko Kung <lokokung@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Austin Eng <enga@chromium.org>
diff --git a/generator/templates/api.h b/generator/templates/api.h
index 7d944ae..0232d46 100644
--- a/generator/templates/api.h
+++ b/generator/templates/api.h
@@ -67,7 +67,6 @@
 #define {{API}}_NULLABLE
 #endif
 
-#define WGPU_BREAKING_CHANGE_COUNT_RENAME
 #define WGPU_BREAKING_WORK_DONE_SIGNAL_VALUE_CHANGE
 
 #include <stdint.h>