remove pyupgrade because it creates python 3.9 backwards-incompatible…

… typing for PEP604

.pre-commit-config.yaml

@@ -27,11 +27,11 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
 
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.1
-    hooks:
-      - id: pyupgrade
-        args: [--py38-plus]
+  #- repo: https://github.com/asottile/pyupgrade
+  #  rev: v3.15.1
+  #  hooks:
+  #    - id: pyupgrade
+  #      args: [--py38-plus]
 
   - repo: https://github.com/PyCQA/autoflake
     rev: v2.3.0

pymatgen/io/validation/validation.py

@@ -36,7 +36,7 @@
 from pymatgen.io.validation.check_potcar import CheckPotcar
 from pymatgen.io.validation.settings import IOValidationSettings
 
-from typing import TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING
 
 if TYPE_CHECKING:
     from typing import Any
@@ -53,7 +53,7 @@ class ValidationDoc(EmmetBaseModel):
     Validation document for a VASP calculation
     """
 
-    task_id: MPID = Field(None, description="The task_id for this validation document")
+    task_id: Optional[MPID] = Field(None, description="The task_id for this validation document")
 
     valid: bool = Field(False, description="Whether this task is valid or not")