Bug 1969980 - Update the doc for removeCollection function since the undo functionality was removed in part 10 https://phabricator.services.mozilla.com/D255848 r=android-reviewers,gmalekpour

Differential Revision: https://phabricator.services.mozilla.com/D260683

Author: t-p-white

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/sessioncontrol/SessionControlController.kt

@@ -219,7 +219,7 @@ interface SessionControlControllerCallback {
     fun registerCollectionStorageObserver()
 
     /**
-     * Callback to remove collection with undo snack bar.
+     * Callback to remove collection.
      */
     fun removeCollection(tabCollection: TabCollection)