Community sweep (#798)

* remove old community driver

* update mandango link

* resolve DOCSP-20476

Author: terakilobyte

source/community-supported-drivers.txt

@@ -55,7 +55,6 @@ Community Libraries
 
    * - Python
      - | `MongoEngine <http://mongoengine.org>`__
-       | `MongoKat <https://github.com/pricingassistant/mongokat>`__
        | `TxMongo <https://github.com/twisted/txmongo>`__
 
    * - R

source/php-libraries.txt

@@ -92,7 +92,7 @@ Stand-alone Libraries
 
 - `Mongator ODM <https://github.com/mongator/mongator/>`_ is an easy, powerful,
   and ultrafast ODM for PHP and MongoDB. It is a fork of the
-  `Mandango ODM <http://mandango.org/>`_.
+  `Mandango ODM <https://github.com/mandango/mandango>`_.
 
 - `MongoFilesystem <https://github.com/AlexanderMitov/MongoFilesystem>`_
   implements a hierarchical file system using MongoDB as a storage engine. The