removed duplicate lines

Author: seferov

cookbook/email/gmail.rst

@@ -120,9 +120,6 @@ If your application uses ``tls`` encryption or ``oauth`` authentication, you
 must override the default options by defining the ``encryption`` and ``auth_mode``
 parameters.
 
-If you are using 2-Step-Verification, you must `generate an App password`_ and
-use this as your ``mailer_password`` value.
-
 If your Gmail account uses 2-Step-Verification, you must `generate an App password`_
 and use it as the value of the ``mailer_password`` parameter. You must also ensure
 that you `allow less secure apps to access your Gmail account`_.