Doc: Remove brittle links to anthropic & co about keys (#816)

docs/installation/keys.md

@@ -22,7 +22,5 @@ The following `keys.cfg` example shows you how the keys are named:
 # OPENAI_API_BASE_URL: 'LM base URL here if using Local or alternative api Endpoint'
 ```
 
-See the following links for tutorials on obtaining [Anthropic](https://docs.anthropic.com/en/api/getting-started), [OpenAI](https://platform.openai.com/docs/quickstart/step-2-set-up-your-api-key), and [Github](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens) tokens.
-
 !!! tip "Models"
     Some more information about the available models in our [usage FAQ](../usage/usage_faq.md).