Remove @removed trySetQuietModeEnabled

Context:
Updated the API according to API council feedback. Marked it as
@Removed and keep it for a while for Launcher. But now Launcher
prebuilt is updated, we are safe to remove it.

Test: Build

BUG: 71818127

Change-Id: I33fec12addf7031bfbcd86bce9e636c31d0ea4d3

api/removed.txt

@@ -265,7 +265,6 @@ package android.os {
     method public android.graphics.drawable.Drawable getBadgedDrawableForUser(android.graphics.drawable.Drawable, android.os.UserHandle, android.graphics.Rect, int);
     method public android.graphics.drawable.Drawable getBadgedIconForUser(android.graphics.drawable.Drawable, android.os.UserHandle);
     method public java.lang.CharSequence getBadgedLabelForUser(java.lang.CharSequence, android.os.UserHandle);
-    method public deprecated boolean trySetQuietModeEnabled(boolean, android.os.UserHandle);
   }
 
 }

core/java/android/os/UserManager.java

@@ -2259,12 +2259,6 @@ public class UserManager {
         }
     }
 
-    /** @removed */
-    @Deprecated
-    public boolean trySetQuietModeEnabled(boolean enableQuietMode, @NonNull UserHandle userHandle) {
-        return requestQuietModeEnabled(enableQuietMode, userHandle);
-    }
-
     /**
      * Enables or disables quiet mode for a managed profile. If quiet mode is enabled, apps in a
      * managed profile don't run, generate notifications, or consume data or battery.