Remove mentions of there being multiple snekbox containers

With python-discord/bot#2618 there will only be 1 snekbox container, that runs the latest verison of snekbox.

Supporting multiple versions of snekbox will be covered by python-discord/snekbox#158 where a single instance of snekbox will nativly support multiple Python verisons.

pydis_site/apps/content/resources/guides/pydis-guides/contributing/bot-extended-configuration-options.md

@@ -115,14 +115,13 @@ The advantage of this method is that you can run the bot's code in your preferre
 
 * Append the following line to your `.env` file: `API_KEYS_SITE_API=badbot13m0n8f570f942013fc818f234916ca531`.
 * In your `.env.server` file, set `urls_site_api="http://localhost:8000/api"`. If you wish to keep using `http://web:8000/api`, then [COMPOSE_PROJECT_NAME](../docker/#compose-project-names) has to be set.
-* To work with snekbox, set `urls_snekbox_eval_api="http://localhost:8060/eval"` and `urls_snekbox_311_eval_api="http://localhost:8065/eval"`
+* To work with snekbox, set `urls_snekbox_eval_api="http://localhost:8060/eval"`.
 
 
 You will need to start the services separately, but if you got the previous section with Docker working, that's pretty simple:
 
 * `docker compose up web` to start the site container. This is required.
 * `docker compose up snekbox` to start the snekbox container. You only need this if you're planning on working on the snekbox cog.
-* `docker compose up snekbox-311` to start the snekbox 3.11 container. You only need this if you're planning on working on the snekbox cog.
 * `docker compose up redis` to start the Redis container. You only need this if you're not using fakeredis. For more info refer to [Working with Redis](#optional-working-with-redis).
 
 You can start several services together: `docker compose up web snekbox redis`.

pydis_site/apps/content/resources/guides/pydis-guides/contributing/bot.md

@@ -134,7 +134,6 @@ Some other useful docker commands are as follows:
 
 1. `docker compose pull` this pulls updates for all non-bot services, such as psotgres, redis and our [site](../site) project!
 1. `docker compose build` this rebuilds the bot's docker image, this is only needed if you need to make changes to the bot's dependencies, or the Dockerfile itself.
-1. `docker compose --profile 3.10 up` this starts a 3.10 snekbox container, in addition to the default 3.11 container!
 
 Your bot is now running, all inside Docker.