Bug 1195743 - Remove old migration step removing bookmarks-menu-button's persisted class attribute. r=gijs

browser/components/nsBrowserGlue.js

@@ -1904,10 +1904,7 @@ BrowserGlue.prototype = {
     }
 
     if (currentUIVersion < 16) {
-      let isCollapsed = xulStore.getValue(BROWSER_DOCURL, "nav-bar", "collapsed");
-      if (isCollapsed == "true") {
-        xulStore.setValue(BROWSER_DOCURL, "nav-bar", "collapsed", "false");
-      }
+      xulStore.removeValue(BROWSER_DOCURL, "nav-bar", "collapsed");
     }
 
     // Insert the bookmarks-menu-button into the nav-bar if it isn't already
@@ -1967,12 +1964,6 @@ BrowserGlue.prototype = {
       xulStore.removeValue(BROWSER_DOCURL, "TabsToolbar", "collapsed");
     }
 
-    if (currentUIVersion < 21) {
-      // Make sure the 'toolbarbutton-1' class will always be present from here
-      // on out.
-      xulStore.removeValue(BROWSER_DOCURL, "bookmarks-menu-button", "class");
-    }
-
     if (currentUIVersion < 22) {
       // Reset the Sync promobox count to promote the new FxAccount-based Sync.
       Services.prefs.clearUserPref("browser.syncPromoViewsLeft");