FEC-11624 Update LocalAssetsManager prepareForDownload  API with @objc (#439)
FEC-11624 Update LocalAssetsManager prepareForDownload  API with @objc (#439)

* Update LocalAssetsManager.swift

* Update LocalAssetsManager.swift

@objc  added to remove(key: String)
kaltura/playkit-ios,kaltura/playkit-ios,kaltura/playkit-ios,kaltura/playkit-ios