fix broken links

Author: PhilKang0704

docs/ide/not-in-toc/default.md

@@ -1475,7 +1475,6 @@ Here's a list of forum resources:
 - [Visual Studio on Q&A](/answers/products/vs/)
 - [Visual Studio MSDN Forum](https://social.msdn.microsoft.com/Forums/vstudio)
 - [Stack Overflow](https://stackoverflow.com/search?q=%22visual+studio%22)
-- [Reddit](https://www.reddit.com/r/VisualStudio)
 
 ##  Feedback and additional support