#13930: remove bad is_subcategory implementation
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   Reporter:  nbruin      |             Owner:  nthiery 
       Type:  defect      |            Status:  new     
   Priority:  major       |         Milestone:  sage-5.6
  Component:  categories  |          Keywords:          
Work issues:              |   Report Upstream:  N/A     
  Reviewers:              |           Authors:          
  Merged in:              |      Dependencies:          
   Stopgaps:              |  
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 As discovered on #13400, there is a bad implementation of `is_subcategory`
 in `categories/covariant_functorial_construction.py`: It doesn't cache
 although it should, it doesn't have a proper docstring and it shadows a
 better implementation on a superclass. It simply needs to be removed.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13930>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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