DOC: remove old links

We no longer use the original buildbot, remove the links.
matplotlib · jenshnielsen · Jul 3, 2016 · Jul 3, 2016 · Jul 3, 2016 · Jul 3, 2016
commit 289fc9e961c9db7b6a778cf7ac2a681b0b8bfe4f
diff --git a/doc/users/credits.rst b/doc/users/credits.rst
@@ -22,11 +22,10 @@ Jeremy O'Donoghue
 Andrew Straw
  Provided much of the log scaling architecture, the fill command, PIL
  support for imshow, and provided many examples.  He also wrote the
-  support for dropped axis spines and the `buildbot
-  <http://mpl-buildbot.code.astraw.com/>`_ unit testing infrastructure
-  which triggers the JPL/James Evans platform specific builds and
-  regression test image comparisons from svn matplotlib across
-  platforms on svn commits.
+  support for dropped axis spines and the original buildbot unit
+  testing infrastructure which triggered the JPL/James Evans platform
+  specific builds and regression test image comparisons from svn
+  matplotlib across platforms on svn commits.

 Charles Twardy
  provided the impetus code for the legend class and has made

diff --git a/doc/users/whats_new.rst b/doc/users/whats_new.rst
@@ -2049,8 +2049,7 @@ been, thanks to improved `software carpentry
 <http://code.google.com/p/python-nose/>`__ regression tests on every
 svn commit, auto-generating a set of images and comparing them against
 a set of known-goods, sending emails to developers on failures with a
-pixel-by-pixel `image comparison
-<http://mpl.code.astraw.com/overview.html>`__.  Releases and release
+pixel-by-pixel image comparison.  Releases and release
 bugfixes happen in branches, allowing active new feature development
 to happen in the trunk while keeping the release branches stable.
 Thanks to Andrew Straw, Michael Droettboom and other matplotlib