Unreviewed build fix- remove void from PlaybackSessionInterfaceLMK destructor
<rdar://problem/122417219>
Pull request: https://github.com/WebKit/WebKit/pull/23949
Committed 274170@main (3c95bd397ff6): <https://commits.webkit.org/274170@main> Reviewed commits have been landed. Closing PR #23949 and removing active labels.