Revert "src/doc/en/thematic_tutorials/tutorial-implementing-algebraic…

…-structures.rst: In subclassing example, import CombinatorialFreeModule" This reverts commit 96f082a.
sagemath · Aug 24, 2022 · 165e6ff · 165e6ff
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diff --git a/src/doc/en/thematic_tutorials/tutorial-implementing-algebraic-structures.rst b/src/doc/en/thematic_tutorials/tutorial-implementing-algebraic-structures.rst
@@ -57,7 +57,6 @@ with the simple command::
 We reproduce the same, but by deriving a subclass of
 :class:`CombinatorialFreeModule`::
 
-    sage: from sage.combinat.free_module import CombinatorialFreeModule
     sage: class MyCyclicGroupModule(CombinatorialFreeModule):
     ....:     """An absolutely minimal implementation of a module whose basis is a cyclic group"""
     ....:     def __init__(self, R, n, *args, **kwargs):