Remove cached image when bookmark is removed.`

[Cortlandd]

Discovered larger app size (cache) because of bookmarks saved. Adapter is downloading the image. Need alternative or a way to kill the cached image.

BookmarkAdapter.kt

doAsync {
    var url = URL(bookmark.thumbnail.toString())
    var bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream())

    uiThread {
       holder.mThumbnailImage.setImageBitmap(bitmap)
    }
}