[async-function-with-timeout] Disable diagnostic for asyncio before P…

…ython3.11 (ASYNC109)

crates/ruff_linter/src/rules/flake8_async/rules/async_function_with_timeout.rs

@@ -6,6 +6,7 @@ use ruff_text_size::Ranged;
 
 use crate::checkers::ast::Checker;
 use crate::rules::flake8_async::helpers::AsyncModule;
+use crate::settings::types::PythonVersion;
 
 /// ## What it does
 /// Checks for `async` functions with a `timeout` argument.
@@ -86,6 +87,11 @@ pub(crate) fn async_function_with_timeout(
         AsyncModule::AsyncIo
     };
 
+    // asyncio.timeout feature was first introduced in Python 3.11
+    if module == AsyncModule::AsyncIo && checker.settings.target_version < PythonVersion::Py311 {
+        return;
+    }
+
     checker.diagnostics.push(Diagnostic::new(
         AsyncFunctionWithTimeout { module },
         timeout.range(),