Remove numpy from mypy pre-commit (#6151)

Author: max-sixty

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
   #     - id: velin
   #       args: ["--write", "--compact"]
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.930
+    rev: v0.931
     hooks:
       - id: mypy
         # `properies` & `asv_bench` are copied from setup.cfg.
@@ -45,8 +45,6 @@ repos:
             types-PyYAML,
             types-pytz,
             typing-extensions==3.10.0.0,
-            # Dependencies that are typed
-            numpy,
           ]
   # run this occasionally, ref discussion https://github.com/pydata/xarray/pull/3194
   # - repo: https://github.com/asottile/pyupgrade