Remove newsletter badge

Author: thinkingserious

README.rst

@@ -1,7 +1,7 @@
 .. image:: https://github.com/sendgrid/sendgrid-python/raw/HEAD/twilio_sendgrid_logo.png
    :target: https://www.sendgrid.com
 
-|Build Status| |Email Notifications Badge| |Twitter Follow| |Codecov branch| |Code Climate| |Python Versions| |PyPI Version| |GitHub contributors| |MIT licensed|
+|Build Status| |Twitter Follow| |Codecov branch| |Code Climate| |Python Versions| |PyPI Version| |GitHub contributors| |MIT licensed|
 
 **The default branch name for this repository has been changed to `main` as of 07/27/2020.**
 
@@ -159,8 +159,6 @@ License
 
 .. |Build Status| image:: https://travis-ci.com/sendgrid/python-http-client.svg?branch=main
    :target: https://travis-ci.com/sendgrid/python-http-client
-.. |Email Notifications Badge| image:: https://dx.sendgrid.com/badge/python
-   :target: https://dx.sendgrid.com/newsletter/python
 .. |Twitter Follow| image:: https://img.shields.io/twitter/follow/sendgrid.svg?style=social&label=Follow
    :target: https://twitter.com/sendgrid
 .. |Codecov branch| image:: https://img.shields.io/codecov/c/github/sendgrid/python-http-client/main.svg?style=flat-square&label=Codecov+Coverage