Remove deprecated Constant field

RELEASES.rst

@@ -6,7 +6,8 @@ Releases
 
 *Unreleased*
 
-- Improve ``ValidationError`` messages for container fields.
+- Remove deprecated ``Constant`` field.
+- Improve ``ValidationError`` messages for container fields. (`7746732`_)
 - Rename ``BaseField`` to ``_Base``. (`c5abc2f`_)
 - Add ``frozenset`` to FIELD_CLASS_MAP. (`24d7c0e`_)
 - Add ``Flatten`` field. (`9c740a5`_)
@@ -17,7 +18,6 @@ Releases
 - Completely rework error handling. (`c95b6b3`_)
 - Make ``Tag.lookup_tag`` default to module + qualname. (`26963d6`_)
 
-.. _c5abc2f: https://github.com/rossmacarthur/serde/commit/c5abc2f1d36e9c0857dc1ea65e4536be4c7397ef
 .. _26963d6: https://github.com/rossmacarthur/serde/commit/26963d65b45229db50444665a3160bd0f1358421
 .. _c95b6b3: https://github.com/rossmacarthur/serde/commit/c95b6b329125164e3301a7e43292c7a858d5e34f
 .. _2a54886: https://github.com/rossmacarthur/serde/commit/2a548865106b1cfc98f5dea8bf00084f62e6334e
@@ -26,6 +26,8 @@ Releases
 .. _34783b0: https://github.com/rossmacarthur/serde/commit/34783b03084acffc1fd1cddf4c987d3855d45330
 .. _9c740a5: https://github.com/rossmacarthur/serde/commit/9c740a5e9f40b1d913f2d718947f7204e87c6ffa
 .. _24d7c0e: https://github.com/rossmacarthur/serde/commit/24d7c0e3320226837586b214ad3dfc0d95852ddb
+.. _c5abc2f: https://github.com/rossmacarthur/serde/commit/c5abc2f1d36e9c0857dc1ea65e4536be4c7397ef
+.. _7746732: https://github.com/rossmacarthur/serde/commit/7746732d2180d6bd9cbf141475f87409b7977343
 
 0.7.3
 -----

src/serde/fields.py

@@ -912,18 +912,6 @@ def validate(self, value):
             )
 
 
-class Constant(Literal):
-    """
-    Deprecated, use `Literal`.
-    """
-
-    def __init__(self, value, **kwargs):
-        """
-        Create a new `Constant`.
-        """
-        super(Constant, self).__init__(value, **kwargs)
-
-
 class Choice(Field):
     """
     One of a given selection of values.

tests/test_fields.py

@@ -13,7 +13,6 @@
     Bytes,
     Choice,
     Complex,
-    Constant,
     Date,
     DateTime,
     Deque,
@@ -1203,14 +1202,6 @@ def test_validate(self):
             assert field.validate(False)
 
 
-class TestConstant:
-    def test___init__(self):
-        # Construct a basic Constant and check values are set correctly.
-        field = Constant(1)
-        assert field.value == 1
-        assert field.validators == []
-
-
 class TestChoice:
     def test___init__(self):
         # Construct a basic Choice and check values are set correctly.