Removed a comment made obsolete by the previous commit.

theano/configdefaults.py

@@ -96,8 +96,6 @@ AddConfigVar('mode',
 enum = EnumStr("g++", "")
 
 # Test whether or not g++ is present: disable C code if it is not.
-# Using the dummy file descriptor below is a workaround for a crash experienced
-# in an unusual Python 2.4.4 Windows environment with the default stdin=None.
 try:
     rc = call_subprocess_Popen(['g++', '-v'], stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE).wait()