src/sage/rings/numbers_abc.py: Remove function deprecated in #32641 (2021)

Author: Matthias Koeppe

src/sage/rings/numbers_abc.py

@@ -2,6 +2,49 @@
 Support Python's numbers abstract base class
 
 .. SEEALSO:: :pep:`3141` for more information about :class:`numbers`.
+
+TESTS::
+
+    sage: import numbers
+    sage: isinstance(5, numbers.Integral)
+    True
+    sage: isinstance(5, numbers.Number)
+    True
+    sage: isinstance(5/1, numbers.Integral)
+    False
+    sage: isinstance(22/7, numbers.Rational)
+    True
+    sage: isinstance(1.3, numbers.Real)
+    True
+    sage: isinstance(CC(1.3), numbers.Real)
+    False
+    sage: isinstance(CC(1.3 + I), numbers.Complex)
+    True
+    sage: isinstance(RDF(1.3), numbers.Real)
+    True
+    sage: isinstance(CDF(1.3, 4), numbers.Complex)
+    True
+    sage: isinstance(AA(sqrt(2)), numbers.Real)                                         # needs sage.rings.number_field sage.symbolic
+    True
+    sage: isinstance(QQbar(I), numbers.Complex)                                         # needs sage.rings.number_field
+    True
+
+This doesn't work with symbolic expressions at all::
+
+    sage: isinstance(pi, numbers.Real)                                                  # needs sage.symbolic
+    False
+    sage: isinstance(I, numbers.Complex)                                                # needs sage.rings.number_field
+    False
+    sage: isinstance(sqrt(2), numbers.Real)                                             # needs sage.rings.number_field sage.symbolic
+    False
+
+Because we do this, NumPy's ``isscalar()`` recognizes Sage types::
+
+    sage: from numpy import isscalar                                                    # needs numpy
+    sage: isscalar(3.141)                                                               # needs numpy
+    True
+    sage: isscalar(4/17)                                                                # needs numpy
+    True
 """
 
 #*****************************************************************************
@@ -13,55 +56,3 @@
 # (at your option) any later version.
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
-
-
-def register_sage_classes():
-    """
-    Register all relevant Sage classes in the :class:`numbers`
-    hierarchy.
-
-    EXAMPLES::
-
-        sage: import numbers
-        sage: isinstance(5, numbers.Integral)
-        True
-        sage: isinstance(5, numbers.Number)
-        True
-        sage: isinstance(5/1, numbers.Integral)
-        False
-        sage: isinstance(22/7, numbers.Rational)
-        True
-        sage: isinstance(1.3, numbers.Real)
-        True
-        sage: isinstance(CC(1.3), numbers.Real)
-        False
-        sage: isinstance(CC(1.3 + I), numbers.Complex)
-        True
-        sage: isinstance(RDF(1.3), numbers.Real)
-        True
-        sage: isinstance(CDF(1.3, 4), numbers.Complex)
-        True
-        sage: isinstance(AA(sqrt(2)), numbers.Real)                                     # needs sage.rings.number_field sage.symbolic
-        True
-        sage: isinstance(QQbar(I), numbers.Complex)                                     # needs sage.rings.number_field
-        True
-
-    This doesn't work with symbolic expressions at all::
-
-        sage: isinstance(pi, numbers.Real)                                              # needs sage.symbolic
-        False
-        sage: isinstance(I, numbers.Complex)                                            # needs sage.rings.number_field
-        False
-        sage: isinstance(sqrt(2), numbers.Real)                                         # needs sage.rings.number_field sage.symbolic
-        False
-
-    Because we do this, NumPy's ``isscalar()`` recognizes Sage types::
-
-        sage: from numpy import isscalar                                                # needs numpy
-        sage: isscalar(3.141)                                                           # needs numpy
-        True
-        sage: isscalar(4/17)                                                            # needs numpy
-        True
-    """
-    from sage.misc.superseded import deprecation
-    deprecation(32641, "register_sage_classes is a deprecated no-op")