message: Enable single execution path for `weighted_metrics` param in compile.
  No special code change is required for this, this use case works already in eager and since v2 is using the eager path this would just continue to work. We have unit tests for this in `metrics_correctness_test`.
diff: @@ -255,7 +255,6 @@ class Model(network.Network):
  if ((sample_weight_mode is not None)
  or (target_tensors is not None)
  - or (weighted_metrics is not None)
  or is_any_optimizer_v1
  or not ops.executing_eagerly_outside_functions()):
  # Fallback out of things that aren't supported with v2 loops
  