Bug 1273291 - Disable focus.html because it's still timing out

--HG--
extra : rebase_source : 941f840defe432a617f23d078e7dee5915100963

testing/web-platform/meta/html/semantics/selectors/pseudo-classes/focus.html.ini

@@ -1,5 +1,3 @@
 [focus.html]
   type: testharness
-  expected:
-    if debug and (os == "linux") and (bits == 32): TIMEOUT
-    if debug and (os == "mac"): TIMEOUT
+  disabled: https://bugzilla.mozilla.org/show_bug.cgi?id=1273291