remove route without filename

src/share/routes.js

@@ -110,6 +110,7 @@ function register(router) {
         res.send(note.getContent());
     });
 
+    // :filename is not used by trilium, but instead used for "save as" to assign a human readable filename
     router.get('/share/api/images/:noteId/:filename', (req, res, next) => {
         shacaLoader.ensureLoad();