Remove mypy configuration and references (#2995)

.gitignore

@@ -1,6 +1,5 @@
 .cache/
 /build/
-.mypy_cache/
 *.pyc
 *.os
 *.o

README.md

@@ -138,7 +138,7 @@ The above tests are themselves tested by:
 * a [mutation test](opendbc/safety/tests/misra/test_mutation.py) on the MISRA coverage
 * 100% line coverage enforced on the safety unit tests
 
-In addition, we run the [ruff linter](https://github.com/astral-sh/ruff) and [mypy](https://mypy-lang.org/) on the car interface library.
+In addition, we run the [ruff linter](https://github.com/astral-sh/ruff) and [ty](https://github.com/astral-sh/ty) on the car interface library.
 
 ### Bounties
 

pyproject.toml

@@ -66,20 +66,6 @@ ignore-words-list = "alo,ba,bu,deque,hda,grey,arange"
 builtin = "clear,rare,informal,code,names,en-GB_to_en-US"
 check-hidden = true
 
-[tool.mypy]
-# helpful warnings
-warn_redundant_casts=true
-warn_unreachable=true
-warn_unused_ignores=true
-
-# restrict dynamic typing
-warn_return_any=true
-
-# allow implicit optionals for default args
-implicit_optional = true
-
-explicit_package_bases=true
-
 # https://beta.ruff.rs/docs/configuration/#using-pyprojecttoml
 [tool.ruff]
 line-length = 160
@@ -135,7 +121,6 @@ possibly-missing-attribute = "ignore"
 unresolved-attribute = "ignore"
 unresolved-import = "ignore"
 
-# Project uses mypy's implicit_optional = true style
 invalid-parameter-default = "ignore"
 
 # Intentional LSP violations in subclass method signatures