c++config: Revert inadvertent change.

2009-04-16  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/c++config: Revert inadvertent change.

From-SVN: r146172

libstdc++-v3/include/bits/c++config

@@ -314,12 +314,4 @@ _GLIBCXX_END_NAMESPACE
 #undef min
 #undef max
 
-#ifndef _GLIBCXX_PURE
-# define _GLIBCXX_PURE __attribute__ ((__pure__))
-#endif
-
-#ifndef _GLIBCXX_CONST
-# define _GLIBCXX_CONST __attribute__ ((__const__))
-#endif
-
 // End of prewritten config; the discovered settings follow.