Temporarily removes Settings button from Back tutorial.

Currently it just crashes, so it shouldn't be there. If
and when we decide to add it back, we will need to get
our package whitelisted to send the necessary Intent.

Bug: 149348244
Change-Id: I5ab292d04ebc5679e34e5a92141df3d86ef6e551
diff --git a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
index fe95e83..f3cefb9 100644
--- a/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
+++ b/quickstep/src/com/android/quickstep/interaction/BackGestureTutorialController.java
@@ -75,9 +75,6 @@
 
     @Override
     Integer getActionTextButtonStringId() {
-        if (mTutorialType == BACK_NAVIGATION_COMPLETE) {
-            return R.string.gesture_tutorial_action_text_button_label;
-        }
         return null;
     }