Remove None check for fallback cProfile import and ExecutionMagics.profile_missing_notice.

This is the fallback for the fallback case of python < 2.5

IPython/core/magics/execution.py

@@ -173,17 +173,9 b' class ExecutionMagics(Magics):'
 
     def __init__(self, shell):
         super(ExecutionMagics, self).__init__(shell)
-        if profile is None:
-            self.prun = self.profile_missing_notice
         # Default execution function used to actually run user code.
         self.default_runner = None
 
-    def profile_missing_notice(self, *args, **kwargs):
-        error("""\
-The profile module could not be found. It has been removed from the standard
-python packages because of its non-free license. To use profiling, install the
-python-profiler package from non-free.""")
-
     @skip_doctest
     @no_var_expand
     @line_cell_magic