Removal of dupolicate function.

Web/app.py

@@ -5417,14 +5417,6 @@ def upload_item():
         except ValueError:
             item_count = 1
 
-    if upload_mode != 'library' and not is_duplicating and not images and not duplicate_images and not book_cover_image:
-        error_msg = 'Bitte laden Sie mindestens ein Bild hoch'
-        if is_mobile:
-            return jsonify({'success': False, 'message': error_msg}), 400
-        else:
-            flash(error_msg, 'error')
-            return redirect(url_for(success_redirect_endpoint))
-
     for code in all_item_codes:
         if not it.is_code_unique(code):
             app.logger.info(f"DEBUG: Code '{code}' is not unique.")