[3.10] pythongh-102444: Fix minor bugs in test_typing highlighted b…

…y pyflakes (python#102445)

(cherry picked from commit 96e1022)

Lib/test/test_typing.py

@@ -4752,16 +4752,6 @@ class C:
         self.assertEqual(get_type_hints(C, globals())['classvar'], ClassVar[int])
         self.assertEqual(get_type_hints(C, globals())['const'], Final[int])
 
-    def test_hash_eq(self):
-        self.assertEqual(len({Annotated[int, 4, 5], Annotated[int, 4, 5]}), 1)
-        self.assertNotEqual(Annotated[int, 4, 5], Annotated[int, 5, 4])
-        self.assertNotEqual(Annotated[int, 4, 5], Annotated[str, 4, 5])
-        self.assertNotEqual(Annotated[int, 4], Annotated[int, 4, 4])
-        self.assertEqual(
-            {Annotated[int, 4, 5], Annotated[int, 4, 5], Annotated[T, 4, 5]},
-            {Annotated[int, 4, 5], Annotated[T, 4, 5]}
-        )
-
     def test_cannot_subclass(self):
         with self.assertRaisesRegex(TypeError, "Cannot subclass .*Annotated"):
             class C(Annotated):
@@ -5309,7 +5299,7 @@ def test_special_attrs2(self):
         self.assertEqual(fr.__module__, 'typing')
         # Forward refs are currently unpicklable.
         for proto in range(pickle.HIGHEST_PROTOCOL + 1):
-            with self.assertRaises(TypeError) as exc:
+            with self.assertRaises(TypeError):
                 pickle.dumps(fr, proto)
 
         self.assertEqual(SpecialAttrsTests.TypeName.__name__, 'TypeName')