fix: context for client-telegram

[Laurentiu-Andronache]

Describe the bug

There's a lot of leftover code from client-twitter that's polluting the context. I will fix it in a pull request!

To Reproduce

Example:

{{recentMessages}}

# Task: Generate a post/reply in the voice, style and perspective of {{agentName}} (@{{twitterUserName}}) while using the thread of tweets as additional context:
Current Post:
{{currentPost}}
Thread of Tweets You Are Replying To:

{{formattedConversation}}

In this section, the variables twitterUserName, currentPost and formattedConversation don't or can't exist.

Expected behavior

For the example above, it should simply show:

{{recentMessages}}

# Task: Generate a post/reply in the voice, style and perspective of {{agentName}} while using the thread above as additional context.