Fix initialization issue with ZenStartup

src/browser/base/content/ZenStartup.mjs

@@ -39,7 +39,6 @@
         gZenUIManager.init();
         gZenVerticalTabsManager.init();
         gZenCompactModeManager.init();
-        gZenPinnedTabManager.init();
 
         function throttle(f, delay) {
           let timer = 0;