num_instances Metric is identical to num_inferences Metric

[hollad]

Compare how both metrics are incremented:

tfx-bsl/tfx_bsl/beam/run_inference.py

Line 269 in 05edfd1

self._num_instances.inc(examples_count)

and

tfx-bsl/tfx_bsl/beam/run_inference.py

Line 270 in 05edfd1

self._inference_counter.inc(examples_count)

This doesn't seem correct.