Bug 1297097 Part 3 - Remove preference "layout.css.vertical-text.enabled" in all.js. r=jfkthame

MozReview-Commit-ID: 7Vk46pB9WEx

--HG--
extra : rebase_source : 023dec16dd2705228f5ee9651595a34a624f8db9

modules/libpref/init/all.js

@@ -2553,9 +2553,6 @@ pref("layout.css.background-blend-mode.enabled", true);
 // Is support for background-clip:text enabled?
 pref("layout.css.background-clip-text.enabled", true);
 
-// Is support for CSS vertical text enabled?
-pref("layout.css.vertical-text.enabled", true);
-
 // Is support for CSS text-combine-upright (tate-chu-yoko) enabled?
 pref("layout.css.text-combine-upright.enabled", true);
 // Is support for CSS text-combine-upright: digits 2-4 enabled?