remove some cached_methods

Author: fchapoton

src/sage/combinat/chas/wqsym.py

@@ -37,7 +37,6 @@
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-from sage.misc.cachefunc import cached_method
 from sage.misc.bindable_class import BindableClass
 from sage.structure.parent import Parent
 from sage.structure.unique_representation import UniqueRepresentation
@@ -238,7 +237,6 @@ def coerce_base_ring(self, x):
             return self._coerce_map_via([target], R)
         return super()._coerce_map_from_(R)
 
-    @cached_method
     def _an_element_(self):
         """
         Return an element of ``self``.

src/sage/combinat/fqsym.py

@@ -165,7 +165,6 @@ def G_to_G_on_basis(t):
 
         return super()._coerce_map_from_(R)
 
-    @cached_method
     def _an_element_(self):
         """
         Return an element of ``self``.

src/sage/combinat/free_dendriform_algebra.py

@@ -315,7 +315,6 @@ def degree_on_basis(self, t):
         """
         return t.node_number()
 
-    @cached_method
     def _an_element_(self):
         """
         Return an element of ``self``.

src/sage/combinat/free_prelie_algebra.py

@@ -375,7 +375,6 @@ def degree_on_basis(self, t):
         """
         return t.node_number()
 
-    @cached_method
     def _an_element_(self):
         """
         Return an element of ``self``.

src/sage/combinat/grossman_larson_algebras.py

@@ -22,7 +22,6 @@
 from sage.combinat.rooted_tree import (RootedTrees, RootedTree,
                                        LabelledRootedTrees,
                                        LabelledRootedTree)
-from sage.misc.cachefunc import cached_method
 from sage.categories.rings import Rings
 from sage.sets.family import Family
 from sage.rings.integer_ring import ZZ
@@ -362,7 +361,6 @@ def degree_on_basis(self, t):
         """
         return t.node_number() - 1
 
-    @cached_method
     def _an_element_(self):
         """
         Return an element of ``self``.

src/sage/combinat/root_system/fundamental_group.py

@@ -531,7 +531,6 @@ def __iter__(self):
         """
         return iter(self.group_generators())
 
-    @cached_method
     def _an_element_(self):
         r"""
         Return an element of ``self``.
@@ -707,7 +706,6 @@ def family(self):
         """
         return LazyFamily(ZZ, lambda i: i)
 
-    @cached_method
     def _an_element_(self):
         r"""
         An element of ``self``.