[IMP] web: make the close props of FileViewer not required

Purpose
=======
In the documents modules, we don't need to give the close props,
and so instead of giving a dummy method, we make it non-required here.

Task-3290796

closes odoo/odoo#126633

Related: odoo/enterprise#40441
Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>

addons/web/static/src/core/file_viewer/file_viewer.js

@@ -25,7 +25,7 @@ import { useService } from "@web/core/utils/hooks";
 export class FileViewer extends Component {
     static template = "web.FileViewer";
     static components = {};
-    static props = ["files", "startIndex", "close", "modal?"];
+    static props = ["files", "startIndex", "close?", "modal?"];
     static defaultProps = {
         modal: true,
     };
@@ -64,7 +64,7 @@ export class FileViewer extends Component {
     }
 
     close() {
-        this.props.close();
+        this.props.close && this.props.close();
     }
 
     next() {