Flip drop_remainder default to False (to match tf.data.Dataset).

PiperOrigin-RevId: 481061799

Author: dzelle

tensorflow_gnn/runner/orchestration.py

@@ -313,8 +313,7 @@ def run(*,
         gtspec: tfgnn.GraphTensorSpec,
         global_batch_size: int,
         epochs: int = 1,
-        # TODO(b/196880966): Flip this default to `False.`
-        drop_remainder: bool = True,
+        drop_remainder: bool = False,
         export_dirs: Optional[Sequence[str]] = None,
         model_exporters: Optional[Sequence[ModelExporter]] = None,
         feature_processors: Optional[Sequence[GraphTensorProcessorFn]] = None,