remove links to tutorials in API docs (#4346)

mkdocs-skeleton.yml

@@ -28,23 +28,6 @@ nav:
   - Latest: /latest/
   - Stable: /stable/
   - Master: /master/
-- Tutorials:
-  - Predicting Paper Venues (pt1): tutorials/getting_started/predicting_paper_venues/predicting_paper_venues_pt1.md
-  - Predicting Paper Venues (pt2): tutorials/getting_started/predicting_paper_venues/predicting_paper_venues_pt2.md
-  - Walk Through:
-    - Configuration: tutorials/getting_started/walk_through_allennlp/configuration.md
-    - Creating a Model: tutorials/getting_started/walk_through_allennlp/creating_a_model.md
-    - Training/Evaluation: tutorials/getting_started/walk_through_allennlp/training_and_evaluating.md
-  - Using Pretrained Models: tutorials/getting_started/using_pretrained_models.md
-  - Semantic Parsing: tutorials/getting_started/semantic_parsing.md
-  - Laziness in AllenNLP: tutorials/getting_started/laziness.md
-- How To:
-  - Create a configuration: tutorials/how_to/create_a_configuration.md
-  - Use Elmo: tutorials/how_to/elmo.md
-  - Train Transformer Elmo: tutorials/how_to/training_transformer_elmo.md
-  - Use Span Representations: tutorials/how_to/span_representations.md
-  - Using a Debugger: tutorials/how_to/using_a_debugger.md
-  - Visualizing Model Internals: tutorials/how_to/visualizing_model_internals.md
 - API: 'This section is autogenerated, do not edit.'
 - Roadmap: ROADMAP.md
 - Contributing: CONTRIBUTING.md