Remove dataclasses backport

.pre-commit-config.yaml

@@ -1,31 +1,32 @@
 repos:
-    - repo: git://github.com/pre-commit/pre-commit-hooks
-      rev: v3.4.0
-      hooks:
-          - id: check-merge-conflict
-          - id: check-json
-          - id: check-yaml
-          - id: debug-statements
-          - id: end-of-file-fixer
-            exclude: ^docs/.*$
-          - id: pretty-format-json
-            args:
-                - --autofix
-          - id: trailing-whitespace
-            exclude: README.md
-    - repo: https://github.com/asottile/pyupgrade
-      rev: v2.9.0
-      hooks:
-          - id: pyupgrade
-    - repo: https://github.com/psf/black
-      rev: 20.8b1
-      hooks:
-          - id: black
-    - repo: https://github.com/PyCQA/flake8
-      rev: 3.8.4
-      hooks:
-          - id: flake8
-    - repo: https://github.com/pycqa/isort
-      rev: 5.6.4
-      hooks:
-          - id: isort
+  - repo: git://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+      - id: check-merge-conflict
+      - id: check-json
+      - id: check-yaml
+      - id: debug-statements
+      - id: end-of-file-fixer
+        exclude: ^docs/.*$
+      - id: pretty-format-json
+        args:
+          - --autofix
+      - id: trailing-whitespace
+        exclude: README.md
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.9.0
+    hooks:
+      - id: pyupgrade
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+        language_version: python3
+  - repo: https://github.com/PyCQA/flake8
+    rev: 3.8.4
+    hooks:
+      - id: flake8
+  - repo: https://github.com/pycqa/isort
+    rev: 5.6.4
+    hooks:
+      - id: isort

setup.cfg

@@ -1,9 +1,9 @@
 [flake8]
-exclude = setup.py,docs/*,*/examples/*,graphene/pyutils/*,tests
+exclude = setup.py,docs/*,*/examples/*,tests
 max-line-length = 120
 
 [coverage:run]
-omit = graphene/pyutils/*,*/tests/*,graphene/types/scalars.py
+omit = */tests/*,graphene/types/scalars.py
 
 [isort]
 profile = black
@@ -12,9 +12,6 @@ known_first_party=graphene
 [mypy]
 ignore_missing_imports = True
 
-[mypy-graphene.pyutils.*]
-ignore_errors = True
-
 [mypy-graphene.types.scalars]
 ignore_errors = True