Make rustc_errors::DiagCtxtHandle::warn no longer a disallowed method

clippy.toml

@@ -1,4 +1,3 @@
 disallowed-methods = [
-    { path = "rustc_errors::DiagCtxtHandle::warn", reason = "ensure `DiagCtxtHandle::warn` is not called from `register_lints`" },
     { path = "std::process::Command::output", reason = "use `CommandExt::logged_output`" },
 ]

examples/experimental/missing_doc_comment_openai/src/lib.rs

@@ -131,7 +131,6 @@ impl MissingDocCommentOpenai {
 impl<'tcx> LateLintPass<'tcx> for MissingDocCommentOpenai {
     fn check_crate(&mut self, cx: &LateContext<'tcx>) {
         if std::env::var(OPENAI_API_KEY).is_err() {
-            #[expect(clippy::disallowed_methods)]
             cx.sess().dcx().warn(format!(
                 "`missing_doc_comment_openai` suggestions are disabled because environment \
                  variable `{OPENAI_API_KEY}` is not set"

examples/general/non_local_effect_before_error_return/src/visit_error_paths.rs

@@ -257,7 +257,6 @@ where
                 FnKind::ItemFn(ident, _, _) | FnKind::Method(ident, _) => format!("`{ident}`"),
                 FnKind::Closure => "closure".to_owned(),
             };
-            #[allow(clippy::disallowed_methods)]
             self.cx.sess().dcx().warn(format!(
                 "reached work limit ({}) while checking {}; set `{}.work_limit` in `dylint.toml` \
                  to override",

examples/general/non_thread_safe_call_in_test/src/late.rs

@@ -65,7 +65,6 @@ impl_lint_pass!(NonThreadSafeCallInTest => [NON_THREAD_SAFE_CALL_IN_TEST]);
 impl<'tcx> LateLintPass<'tcx> for NonThreadSafeCallInTest {
     fn check_crate(&mut self, cx: &LateContext<'tcx>) {
         if !cx.sess().opts.test {
-            #[allow(clippy::disallowed_methods)]
             cx.sess().dcx().warn(
                 "`non_thread_safe_call_in_test` is unlikely to be effective as `--test` was not \
                  passed to rustc",