[flake8-pyi] Also remove self and cls's annotation (PYI034) (#14801)

Co-authored-by: Alex Waygood <alex.waygood@gmail.com>

crates/ruff_python_semantic/src/analyze/typing.rs

@@ -778,6 +778,40 @@ impl TypeChecker for PathlibPathChecker {
     }
 }
 
+pub struct TypeVarLikeChecker;
+
+impl TypeVarLikeChecker {
+    /// Returns `true` if an [`Expr`] is a `TypeVar`, `TypeVarTuple`, or `ParamSpec` call.
+    ///
+    /// See also [`ruff_linter::rules::flake8_pyi::rules::simple_defaults::is_type_var_like_call`].
+    fn is_type_var_like_call(expr: &Expr, semantic: &SemanticModel) -> bool {
+        let Expr::Call(ast::ExprCall { func, .. }) = expr else {
+            return false;
+        };
+        let Some(qualified_name) = semantic.resolve_qualified_name(func) else {
+            return false;
+        };
+
+        matches!(
+            qualified_name.segments(),
+            [
+                "typing" | "typing_extensions",
+                "TypeVar" | "TypeVarTuple" | "ParamSpec"
+            ]
+        )
+    }
+}
+
+impl TypeChecker for TypeVarLikeChecker {
+    fn match_annotation(_annotation: &Expr, _semantic: &SemanticModel) -> bool {
+        false
+    }
+
+    fn match_initializer(initializer: &Expr, semantic: &SemanticModel) -> bool {
+        Self::is_type_var_like_call(initializer, semantic)
+    }
+}
+
 /// Test whether the given binding can be considered a list.
 ///
 /// For this, we check what value might be associated with it through it's initialization and
@@ -867,6 +901,11 @@ pub fn is_pathlib_path(binding: &Binding, semantic: &SemanticModel) -> bool {
     check_type::<PathlibPathChecker>(binding, semantic)
 }
 
+/// Test whether the given binding is for an old-style `TypeVar`, `TypeVarTuple` or a `ParamSpec`.
+pub fn is_type_var_like(binding: &Binding, semantic: &SemanticModel) -> bool {
+    check_type::<TypeVarLikeChecker>(binding, semantic)
+}
+
 /// Find the [`ParameterWithDefault`] corresponding to the given [`Binding`].
 #[inline]
 fn find_parameter<'a>(