Remove VisualizationWallpapers as it does not comply with API 23 rules

Change-Id: I2cb868713ab13b13c5ebb6d468375c4511aca81d
Reference: https://android.googlesource.com/device/asus/flo/+/1bde1e17aa8fbe9ec905a55fe3be7a106eda9d82%5E%21/#F0
1 file changed