Remove country topics from Hacktoberfest

As with the year topics, these topics are not tracked by Hacktoberfest and do not opt-in a repository. Having them listed may likely lead to contributors looking at repositories that are not opted-in for Hacktoberfest, and then having their contributions not be counted.

Further, all the topics linked here are essentially unused, returning less than 5 repositories each in their results.

topics/hacktoberfest/index.md

@@ -10,8 +10,5 @@ aliases: hacktoberfest-contributions, hacktoberfest-repo, hacktoberfest-contribu
 ---
 **Hacktoberfest** is a month-long celebration of open source projects, their maintainers, and the entire community of contributors. Each October, open source maintainers give new contributors extra attention as they guide developers through their first pull requests on GitHub.
 
-# By country
-[🇳🇵 Nepal](https://github.com/topics/hacktoberfestnepal) • [🇮🇩 Indonesia](https://github.com/topics/hacktoberfest-indonesia) • **[🇮🇳 India](https://github.com/topics/hacktoberfest-india)** ([West Bengal](https://github.com/topics/hacktoberfest-westbengal)) • [🇧🇷 Brazil](https://github.com/topics/hacktoberfest-brasil)
-
 # By programming language
 [JavaScript](https://github.com/topics/hacktoberfest?l=javascript) • [Python](https://github.com/topics/hacktoberfest?l=python) • [Java](https://github.com/topics/hacktoberfest?l=java)