Remove the unused CarUserManagerHelper import.

Test: build
Bug: 113868873
Change-Id: I045815f1cbdcebcd471f3a5659656aaf4d4a0f89
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
index 304a00f..2d03ed0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
@@ -17,7 +17,6 @@
 package com.android.systemui.statusbar.car;
 
 import android.app.ActivityTaskManager;
-import android.car.user.CarUserManagerHelper;
 import android.graphics.PixelFormat;
 import android.graphics.drawable.Drawable;
 import android.util.Log;