Removed unused code and dependencies

[Eraldo]

As a developer, I want obsolete code and dependencies to be gone from the current codebase, so that I have less code to maintain and make it easier for other developers to grasp what is going on.

Model candidates:

• Currently unused page models.
• Biographys
• Guide relations
• Inner calls
• Outer calls
• Visions
• Waiting users

Misc candidates:

• template related stuff (template tags etc)

I want to remove them with confidence, since I have the repo to timetravel in case I want to look back. When it comes to content, I will update relevant data in drive storage.