[polly] r273338 - Remove leftover autoconf directory

[Tobias Grosser via llvm-commits]

Author: grosser
Date: Tue Jun 21 18:56:18 2016
New Revision: 273338

URL: http://llvm.org/viewvc/llvm-project?rev=273338&view=rev
Log:
Remove leftover autoconf directory

The content of this directory was removed in r259041, but the directory itself
was forgotten (probably because of using git-svn).

Reported-by: Eugene Zelenko <eugene.zelenko at gmail.com>

Removed:
    polly/trunk/autoconf/