Removed the code that set the cmake policy CMP0015 which apparently

no longer exists or only ever existed in a beta version or something.
At any rate, these lines were causing cmake to fail on some versions
of Mac OS X.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403568

dlib/CMakeLists.txt

@@ -11,9 +11,6 @@ cmake_minimum_required(VERSION 2.4)
 # Suppress cmake warnings about changes in new versions.
 if(COMMAND cmake_policy) 
    cmake_policy(SET CMP0003 NEW) 
-   if(POLICY CMP0015)
-      cmake_policy(SET CMP0015 NEW)
-   endif()
 endif()