gh-113317: Remove unused INVALID constant in Argument Clinic (#117624)

Author: vstinner

Lib/test/test_clinic.py

@@ -4048,9 +4048,6 @@ def test_Class_repr(self):
         self.assertRegex(repr(cls), r"<clinic.Class 'foo' at \d+>")
 
     def test_FunctionKind_repr(self):
-        self.assertEqual(
-            repr(FunctionKind.INVALID), "<clinic.FunctionKind.INVALID>"
-        )
         self.assertEqual(
             repr(FunctionKind.CLASS_METHOD), "<clinic.FunctionKind.CLASS_METHOD>"
         )

Tools/clinic/libclinic/function.py

@@ -53,7 +53,6 @@ def __repr__(self) -> str:
 
 
 class FunctionKind(enum.Enum):
-    INVALID         = enum.auto()
     CALLABLE        = enum.auto()
     STATIC_METHOD   = enum.auto()
     CLASS_METHOD    = enum.auto()
@@ -70,7 +69,6 @@ def __repr__(self) -> str:
         return f"<clinic.FunctionKind.{self.name}>"
 
 
-INVALID: Final = FunctionKind.INVALID
 CALLABLE: Final = FunctionKind.CALLABLE
 STATIC_METHOD: Final = FunctionKind.STATIC_METHOD
 CLASS_METHOD: Final = FunctionKind.CLASS_METHOD