removed hyperlink for web browsable API on homepage (#9174)

Author: Krishna2864

README.md

@@ -39,7 +39,7 @@ Django REST framework is a powerful and flexible toolkit for building Web APIs.
 
 Some reasons you might want to use REST framework:
 
-* The [Web browsable API][sandbox] is a huge usability win for your developers.
+* The Web browsable API is a huge usability win for your developers.
 * [Authentication policies][authentication] including optional packages for [OAuth1a][oauth1-section] and [OAuth2][oauth2-section].
 * [Serialization][serializers] that supports both [ORM][modelserializer-section] and [non-ORM][serializer-section] data sources.
 * Customizable all the way down - just use [regular function-based views][functionview-section] if you don't need the [more][generic-views] [powerful][viewsets] [features][routers].

docs/index.md

@@ -48,7 +48,7 @@ Django REST framework is a powerful and flexible toolkit for building Web APIs.
 
 Some reasons you might want to use REST framework:
 
-* The [Web browsable API][sandbox] is a huge usability win for your developers.
+* The Web browsable API is a huge usability win for your developers.
 * [Authentication policies][authentication] including packages for [OAuth1a][oauth1-section] and [OAuth2][oauth2-section].
 * [Serialization][serializers] that supports both [ORM][modelserializer-section] and [non-ORM][serializer-section] data sources.
 * Customizable all the way down - just use [regular function-based views][functionview-section] if you don't need the [more][generic-views] [powerful][viewsets] [features][routers].