Created by: baiyfbupt

PR types

Others

PR changes

APIs

Describe

1. Migrate adaptive_pool2d|adaptive_pool3d|mse_loss|square_error_cost code example and doc to API 2.0
2. Remove adaptive_pool2d|adaptive_pool3d API alias, because adaptive_(avg/max)_(pool2d/pool3d) APIs have been added in API 2.0 already.