Remove a couple of archived third-party repos (#1622)

Author: cclauss

docs/panels.rst

@@ -141,26 +141,6 @@ Third-party panels
 
 If you'd like to add a panel to this list, please submit a pull request!
 
-Flamegraph
-~~~~~~~~~~
-
-URL: https://github.com/23andMe/djdt-flamegraph
-
-Path: ``djdt_flamegraph.FlamegraphPanel``
-
-Generates a flame graph from your current request.
-
-Haystack
-~~~~~~~~
-
-URL: https://github.com/streeter/django-haystack-panel
-
-Path: ``haystack_panel.panel.HaystackDebugPanel``
-
-See queries made by your Haystack_ backends.
-
-.. _Haystack: http://haystacksearch.org/
-
 HTML Tidy/Validator
 ~~~~~~~~~~~~~~~~~~~