[docs] disable GTM (#20409)

Author: blinkov

ydb/docs/.yfm

@@ -26,8 +26,6 @@ docs-viewer:
   langs: ['en','ru']
   themes: ['light', 'dark']
   favicon-src: https://storage.yandexcloud.net/ydb-site-assets/favicon-202305/favicon.ico
-  gtm: 
-    id: GTM-W7ZBL4X
   github-url-prefix: https://github.com/ydb-platform/ydb/tree/main/ydb/docs
   unrestrict-revision-access: true
   need_pdf: true