Merge pull request #9913 from edx/doc-remove-repetition

Don't repeat the word 'standard'

docs/en_us/platform_api/source/authentication.rst

@@ -10,7 +10,7 @@ OAuth 2.0
 
 The edX Platform APIs use OAuth 2.0 for authentication. OAuth 2.0 is an open
 standard used by many systems that require secure user authentication. See the
-`OAuth 2.0 Standard`_ standard for more information.
+`OAuth 2.0 Standard`_ for more information.
 
 ***************************************
 Registering with Your Open edX Instance
@@ -20,4 +20,4 @@ To use the edX Platform API with courses on your instance of Open edX, you must
 register your application with the Open edX server. See the OAuth 2.0
 specification for details.
 
-.. include:: links.rst
\ No newline at end of file
+.. include:: links.rst