remove quick-ref from landing

Author: lindseymoore

source/index.txt

@@ -62,12 +62,6 @@ What's New
 For a list of new features and changes in each version, see the :ref:`What's New <kotlin-sync-whats-new>`
 section.
 
-Quick Reference
----------------
-
-See driver syntax examples for common MongoDB commands in the
-:ref:`Quick Reference <kotlin-sync-quick-reference>` section.
-
 Write Data to MongoDB
 ---------------------