Reduce use of Any in equality methods (#7081)

Co-authored-by: Akuli <akuviljanen17@gmail.com>

stdlib/lib2to3/pgen2/pgen.pyi

@@ -41,6 +41,6 @@ class DFAState:
     def __init__(self, nfaset: dict[NFAState, Any], final: NFAState) -> None: ...
     def addarc(self, next: DFAState, label: str) -> None: ...
     def unifystate(self, old: DFAState, new: DFAState) -> None: ...
-    def __eq__(self, other: Any) -> bool: ...
+    def __eq__(self, other: DFAState) -> bool: ...  # type: ignore[override]
 
 def generate_grammar(filename: StrPath = ...) -> PgenGrammar: ...