update docs

Author: haifeng-jin

docs/mkdocs.yml

@@ -41,25 +41,24 @@ nav:
     - Image Regression: tutorial/image_regression.md
     - Text Classification: tutorial/text_classification.md
     - Text Regression: tutorial/text_regression.md
+    - Structured Data Classification: tutorial/structured_data_classification.md
+    - Structured Data Regression: tutorial/structured_data_regression.md
     - Multi-Modal and Multi-Task: tutorial/multi.md
     - Customized Model: tutorial/customized.md
     - Export Model: tutorial/export.md
     - Load Data from Disk: tutorial/load.md
     - FAQ: tutorial/faq.md
-  - Extensions:
-    - TensorFlow Cloud: extensions/tf_cloud.md
-    - TRAINS: extensions/trains.md
-  - Docker: docker.md
   - Contributing Guide: contributing.md
   - Documentation:
     - ImageClassifier: image_classifier.md
     - ImageRegressor: image_regressor.md
     - TextClassifier: text_classifier.md
     - TextRegressor: text_regressor.md
+    - StructuredDataClassifier: structured_data_classifier.md
+    - StructuredDataRegressor: structured_data_regressor.md
     - AutoModel: auto_model.md
     - Base Class: base.md
     - Node: node.md
     - Block: block.md
     - Utils: utils.md
-  - Benchmarks: benchmarks.md
   - About: about.md