Remove hacks for broken `with-suppressed-warnings'

* test/lisp/obsolete/cl-tests.el (labels-function-quoting):
* test/lisp/tar-mode-tests.el (tar-mode-test-tar-grind-file-mode):
Remove hack for broken `with-suppressed-warnings'.

test/lisp/obsolete/cl-tests.el

@@ -25,17 +25,11 @@
   (require 'cl))
 (require 'ert)
 
-
-
-;; Hack to work around the ERT limitation that we can't reliably use
-;; `with-suppressed-warnings' inside an `ert-deftest'.  (Bug#36568)
-(defun cl-tests-labels-test ()
-  (with-suppressed-warnings ((obsolete labels))
-    (funcall (labels ((foo () t))
-                     #'foo))))
-
 (ert-deftest labels-function-quoting ()
   "Test that #'foo does the right thing in `labels'." ; Bug#31792.
-  (should (eq (cl-tests-labels-test) t)))
+  (with-suppressed-warnings ((obsolete labels))
+    (should (eq (funcall (labels ((foo () t))
+                                 #'foo))
+                t))))
 
 ;;; cl-tests.el ends here

test/lisp/tar-mode-tests.el

@@ -24,12 +24,6 @@
 (defvar tar-mode-tests-data-directory
   (expand-file-name "test/data/decompress" source-directory))
 
-;; Hack to work around the ERT limitation that we can't reliably use
-;; `with-suppressed-warnings' inside an `ert-deftest'.  (Bug#36568)
-(defun tar-mode-tests--tar-grind-file-mode (&rest args)
-  (with-suppressed-warnings ((obsolete tar-grind-file-mode))
-    (apply #'tar-grind-file-mode args)))
-
 (ert-deftest tar-mode-test-tar-grind-file-mode ()
   (let ((alist (list (cons 448 "rwx------")
                      (cons 420 "rw-r--r--")
@@ -38,7 +32,8 @@
                      (cons 1024 "-----S---")
                      (cons 2048 "--S------"))))
     (dolist (x alist)
-      (should (equal (cdr x) (tar-mode-tests--tar-grind-file-mode (car x)))))))
+      (with-suppressed-warnings ((obsolete tar-grind-file-mode))
+        (should (equal (cdr x) (tar-grind-file-mode (car x))))))))
 
 (ert-deftest tar-mode-test-tar-extract-gz ()
   (skip-unless (executable-find "gzip"))