Don't register deprecated magics that have been removed.

IPython/core/interactiveshell.py

@@ -2021,7 +2021,7 b' class InteractiveShell(SingletonConfigurable):'
         self.register_magics = self.magics_manager.register
 
         self.register_magics(m.AutoMagics, m.BasicMagics, m.CodeMagics,
-            m.ConfigMagics, m.DeprecatedMagics, m.DisplayMagics, m.ExecutionMagics,
+            m.ConfigMagics, m.DisplayMagics, m.ExecutionMagics,
             m.ExtensionMagics, m.HistoryMagics, m.LoggingMagics,
             m.NamespaceMagics, m.OSMagics, m.PylabMagics, m.ScriptMagics,
         )