Fix displaying history when output cache is disabled.

Closes gh-2581

IPython/core/magics/history.py

@@ -121,10 +121,6 b' class HistoryMagics(Magics):'
 
         """
 
-        if not self.shell.displayhook.do_full_cache:
-            print('This feature is only available if numbered prompts '
-                  'are in use.')
-            return
         args = parse_argstring(self.history, parameter_s)
 
         # For brevity