Remove an extra constant definition that is now being generated by newer versions of cbindgen (0.24),

and causing build failures because it is defined in several places.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1773259
Forwarded: not-needed

Gbp-Pq: Name fix-ftbfs-newer-cbindgen.patch

gfx/webrender_bindings/webrender_ffi.h

@@ -73,8 +73,6 @@ struct WrPipelineInfo;
 struct WrPipelineIdAndEpoch;
 using WrPipelineIdEpochs = nsTArray<WrPipelineIdAndEpoch>;
 
-const uint64_t ROOT_CLIP_CHAIN = ~0;
-
 }  // namespace wr
 }  // namespace mozilla