client/components/tinymce/plugins/wpcom-view/plugin.js
function deselect() {
		let clipboard,
			dom = editor.dom;

		if ( selected ) {
			clipboard = editor.dom.select( '.wpview-clipboard', selected )[ 0 ];
			dom.unbind( clipboard );
			dom.remove( clipboard );

			dom.unbind( selected, 'beforedeactivate focusin focusout click mouseup', _stop );
			dom.setAttrib( selected, 'data-mce-selected', null );
		}

		selected = null;
	}
function deselect() {
		let clipboard,
			dom = editor.dom;

		if ( selected ) {
			clipboard = editor.dom.select( '.wpview-clipboard', selected )[ 0 ];
			dom.unbind( clipboard );
			dom.remove( clipboard );

			dom.unbind( selected, 'beforedeactivate focusin focusout click mouseup', _stop );
			dom.setAttrib( selected, 'data-mce-selected', null );
		}

		selected = null;
	}
Deselect a selected view and remove clipboard