Revert empty slot test

Also disable pyupgrade on that file.

Signed-off-by: Hynek Schlawack <hs@ox.cx>

Author: hynek

.pre-commit-config.yaml

@@ -13,6 +13,7 @@ repos:
     hooks:
       - id: pyupgrade
         args: [--py3-plus, --keep-percent-format]
+        exclude: "tests/test_slots.py"
 
   - repo: https://github.com/PyCQA/isort
     rev: 5.10.1

tests/test_slots.py

@@ -627,7 +627,7 @@ class C:
         field = attr.ib()
 
         def f(self, a):
-            super().__init__()
+            super(C, self).__init__()
 
     C(field=1)