Docs: Fixes duplicate sphinx target

docs/getting-started/first-steps-with-celery.rst

@@ -75,7 +75,7 @@ Redis
 `Redis`_ is also feature-complete, but is more susceptible to data loss in
 the event of abrupt termination or power failures. Detailed information about using Redis:
 
-    :ref:`broker-redis`
+:ref:`broker-redis`
 
 .. _`Redis`: http://redis.io/
 
@@ -205,7 +205,6 @@ and -- or you can define your own.
 
 .. _`Memcached`: http://memcached.org
 .. _`MongoDB`: http://www.mongodb.org
-.. _`Redis`: http://redis.io
 .. _`SQLAlchemy`: http://www.sqlalchemy.org/
 .. _`Django`: http://djangoproject.com