Remove mention from docs

_data/nav_docs.yml

@@ -53,8 +53,6 @@
       title: Animation
     - id: two-way-binding-helpers
       title: Two-Way Binding Helpers
-    - id: class-name-manipulation
-      title: Class Name Manipulation
     - id: test-utils
       title: Test Utilities
     - id: clone-with-props

docs/10-addons.md

@@ -14,7 +14,6 @@ next: animation.html
 - [`createFragment`](create-fragment.html), to create a set of externally-keyed children.
 - [`update`](update.html), a helper function that makes dealing with immutable data in JavaScript easier.
 - [`PureRenderMixin`](pure-render-mixin.html), a performance booster under certain situations.
-- (DEPRECATED) [`classSet`](class-name-manipulation.html), for manipulating the DOM `class` string a bit more cleanly.
 
 The add-ons below are in the development (unminified) version of React only:
 

docs/10.2-form-input-binding-sugar.md

@@ -3,7 +3,7 @@ id: two-way-binding-helpers
 title: Two-Way Binding Helpers
 permalink: two-way-binding-helpers.html
 prev: animation.html
-next: class-name-manipulation.html
+next: test-utils.html
 ---
 
 `ReactLink` is an easy way to express two-way binding with React.

docs/10.4-test-utils.md

@@ -2,7 +2,7 @@
 id: test-utils
 title: Test Utilities
 permalink: test-utils.html
-prev: class-name-manipulation.html
+prev: two-way-binding-helpers.html
 next: clone-with-props.html
 ---