Remove mypy (#566)

We have pyrefly, and we probably don't need 2 type checkers

Author: stroxler

makefile

@@ -25,7 +25,6 @@ venv: .venv
 
 test:
 	python -m $(PKG).tests
-	python -m mypy -p $(PKG)
 	pyrefly check -c pyproject.toml
 
 lint:

pyproject.toml

@@ -48,7 +48,6 @@ dev = [
     "build > 1",
     "flake8 == 7.3.0",
     "flake8-bugbear == 24.12.12",
-    "mypy == 1.19.1",
     "ufmt == 2.8.0",
     "usort == 1.0.8.post1",
     "pyrefly == 0.63.1",
@@ -100,12 +99,6 @@ exclude = [
     "/legacy",
 ]
 
-[tool.mypy]
-strict = true
-python_version = "3.9"
-ignore_missing_imports = true
-warn_unused_ignores = false
-
 [tool.pyrefly]
 project_includes = [
     # Start by adding a single file and we'll expand as we go