[BottomNavigation] Remove redundant link and update copy.

components/BottomNavigation/.vars

@@ -5,6 +5,6 @@ root_path=/catalog/bottomnavigation
 icon_id=bottom_navigation
 color_themer_api=MDCBottomNavigationBarColorThemer
 typography_themer_api=MDCBottomNavigationBarTypographyThemer
-short_description=Bottom navigation provides a bar at the bottom of the screen with items to navigate between different views.
+short_description=Bottom navigation bars allow movement between primary destinations in an app.
 guidelines_short_link=design-bottom-navigation
 guidelines_title=Bottom navigation

components/BottomNavigation/README.md

@@ -2,7 +2,7 @@
 title: "Bottom navigation"
 layout: detail
 section: components
-excerpt: "Bottom navigation provides a bar at the bottom of the screen with items to navigate between different views."
+excerpt: "Bottom navigation bars allow movement between primary destinations in an app."
 iconId: bottom_navigation
 path: /catalog/bottomnavigation/
 api_doc_root: true
@@ -12,7 +12,8 @@ api_doc_root: true
 
 # Bottom navigation
 
-[Bottom navigation](https://material.io/go/design-bottom-navigation) makes it easy to explore and switch between top-level views in a single tap. Tapping on a bottom navigation icon takes you directly to the associated view or refreshes the currently active view.
+Bottom navigation bars allow movement between primary destinations in an app. Tapping on a bottom
+navigation icon takes you directly to the associated view or refreshes the currently active view.
 
 <div class="article__asset article__asset--screenshot">
   <img src="docs/assets/bottom-navigation.gif" alt="An animation showing a change of selection in a bottom navigation component." width="320">

components/BottomNavigation/docs/README.md

@@ -1,6 +1,7 @@
 # Bottom navigation
 
-[Bottom navigation](https://material.io/go/design-bottom-navigation) makes it easy to explore and switch between top-level views in a single tap. Tapping on a bottom navigation icon takes you directly to the associated view or refreshes the currently active view.
+Bottom navigation bars allow movement between primary destinations in an app. Tapping on a bottom
+navigation icon takes you directly to the associated view or refreshes the currently active view.
 
 <div class="article__asset article__asset--screenshot">
   <img src="docs/assets/bottom-navigation.gif" alt="An animation showing a change of selection in a bottom navigation component." width="320">