Proofread chapter 6

docs/guide/src/SUMMARY.md

@@ -14,11 +14,6 @@
   - [Reusing, Importing, and Exporting](components/exporting_components.md)
   - [Children and Attributes](components/component_children.md)
   - [How Data Flows](components/composing.md)
-- [Thinking Reactively]()
-  - [Thinking Reactively]()
-  - [Thinking Reactively]()
-  - [Thinking Reactively]()
-  - [Thinking Reactively]()
 - [Adding Interactivity](interactivity/index.md)
   - [Hooks and Internal State](interactivity/hooks.md)
   - [UseState and UseRef](interactivity/importanthooks.md)