ci: drop mypy checks with Python 3.9 (#489)

* drop mypy in Python 3.9 mode from pre-commit
* keep mypy in Python 3.12 mode
* updated pre-commit

.pre-commit-config.yaml

@@ -4,14 +4,8 @@ repos:
     hooks:
     -   id: black
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.1
+    rev: v1.11.2
     hooks:
-    -   id: mypy
-        name: mypy with Python 3.9
-        files: src/cabinetry
-        additional_dependencies: ["numpy>=1.22", "boost-histogram>=1.0.1", "click>=8", "types-tabulate", "types-PyYAML", "hist>=2.3.0"]
-        # numpy 1.25 is no longer compatible with Python 3.8, so use Python >=3.9 for type checking
-        args: ["--python-version=3.9"]
     -   id: mypy
         name: mypy with Python 3.12
         files: src/cabinetry