chore: remove Discord

Author: vmihailenco

.github/FUNDING.yml

@@ -1 +1 @@
-custom: ['https://uptrace.dev']
+custom: ['https://uptrace.dev/sponsor']

.github/ISSUE_TEMPLATE/config.yml

@@ -3,6 +3,3 @@ contact_links:
   - name: Discussions
     url: https://github.com/go-redis/redis/discussions
     about: Ask a question via GitHub Discussions
-  - name: Discord
-    url: https://discord.gg/rWtp5Aj
-    about: Ask a question via Discord

README.md

@@ -9,10 +9,8 @@
 ![build workflow](https://github.com/go-redis/redis/actions/workflows/build.yml/badge.svg)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/go-redis/redis/v8)](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)
 [![Documentation](https://img.shields.io/badge/redis-documentation-informational)](https://redis.uptrace.dev/)
-[![Chat](https://discordapp.com/api/guilds/752070105847955518/widget.png)](https://discord.gg/rWtp5Aj)
 
-- To ask questions, join [Discord](https://discord.gg/rWtp5Aj) or use
-  [Discussions](https://github.com/go-redis/redis/discussions).
+- [Discussions](https://github.com/go-redis/redis/discussions).
 - [Newsletter](https://blog.uptrace.dev/pages/newsletter.html) to get latest updates.
 - [Documentation](https://redis.uptrace.dev)
 - [Reference](https://pkg.go.dev/github.com/go-redis/redis/v8?tab=doc)