Removed command deprecated in Sphinx 1.6.

Author: cgranade

doc/source/conf.py

@@ -66,7 +66,6 @@
     \let\footnotesize\small
     \let\footnoterule\relax
     \rule{\textwidth}{1pt}%
-    \ifsphinxpdfoutput
       \begingroup
       % These \defs are required to deal with multi-line authors; it
       % changes \\ to ', ' (comma-space), making it pass muster for