_sidebar.md in flows-0.4.0

- old
+ new
@@ -1,26 +1,2 @@
 * Overview
   * [Getting Started](README.md)
-  * [Performance](overview/performance.md)
-
-* Result Objects
-  * [Basic Usage](result_objects/basic_usage.md)
-  * [Do Notation](result_objects/do_notation.md)
-
-* Railway
-  * [Basic Usage](railway/basic_usage.md)
-
-* Operation
-  * [Basics](operation/basic_usage.md)
-  * [Result Shapes](operation/result_shapes.md)
-  * [Routing & Tracks](operation/routing_tracks.md)
-  * [Lambda Steps](operation/lambda_steps.md)
-  * [Inject Steps](operation/inject_steps.md)
-  * [Wrapping Steps](operation/wrapping_steps.md)
-
-* Flow
-  * [General Idea](flow/general_idea.md)
-  * [Direct Usage](flow/direct_usage.md)
-
-* Contributing
-  * [Local Development](contributing/local_development.md)
-  * [Benchmarks & Profiling](contributing/benchmarks_profiling.md)