remove deprecated stuff in matroids/

src/sage/matroids/matroid.pyx

@@ -348,7 +348,6 @@ from itertools import combinations, product
 from sage.matrix.constructor import matrix
 from sage.misc.lazy_import import LazyImport
 from sage.misc.prandom import shuffle
-from sage.misc.superseded import deprecated_function_alias
 from sage.rings.integer_ring import ZZ
 from sage.structure.richcmp cimport rich_to_bool, richcmp
 from sage.structure.sage_object cimport SageObject
@@ -2934,8 +2933,6 @@ cdef class Matroid(SageObject):
                 if self._rank(X) == len(X):
                     yield X
 
-    independent_r_sets = deprecated_function_alias(38057, independent_sets)
-
     cpdef list _extend_flags(self, list flags):
         r"""
         Recursion for the ``self._flags(r)`` method.

src/sage/matroids/matroids_catalog.py

@@ -184,6 +184,5 @@
     ),
 )
 lazy_import("sage.matroids", "catalog")
-lazy_import("sage.matroids", "named_matroids")
 
 del lazy_import  # delete so it doesn't appear under tab completion

src/sage/matroids/meson.build

@@ -33,7 +33,6 @@ py.install_sources(
   'matroids_catalog.py',
   'matroids_plot_helpers.py',
   'minor_matroid.py',
-  'named_matroids.py',
   'rank_matroid.py',
   'set_system.pxd',
   'set_system.pyx',