Change expected result of a flymake test on hydra

* test/lisp/progmodes/flymake-tests.el (different-diagnostic-types):
Test is now passing on hydra.nixos.org, since today.

test/lisp/progmodes/flymake-tests.el

@@ -144,9 +144,7 @@ SEVERITY-PREDICATE is used to setup
 
 (ert-deftest different-diagnostic-types ()
   "Test GCC warning via function predicate."
-  ;; http://lists.gnu.org/archive/html/emacs-devel/2019-03/msg01043.html
-  :expected-result (if (or (getenv "EMACS_HYDRA_CI") (getenv "EMACS_EMBA_CI"))
-                       :failed :passed)
+  :expected-result (if (getenv "EMACS_EMBA_CI") :failed :passed)
   (skip-unless (and (executable-find "gcc")
                     (version<=
                      "5" (string-trim