Remove documentation for deprecated action in Habitica

[tr4nt0r]

Proposed change

Remove documentation for deprecated API call action

Type of change

• [ ] Spelling, grammar or other readability improvements (current branch).
• [ ] Adjusted missing or incorrect information in the current documentation (current branch).
• [ ] Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • [ ] I've opened up a PR to add logos and icons in Brands repository.
• [ ] Added documentation for a new feature I'm adding to Home Assistant (next branch).
• [x] Removed stale or deprecated documentation.

Additional information

• Link to parent pull request in the codebase: https://github.com/home-assistant/core/pull/128119
• Link to parent pull request in the Brands repository:
• This PR fixes or closes issue: fixes #

Checklist

• [x] This PR uses the correct branch, based on one of the following:
  • I made a change to the existing documentation and used the current branch.
  • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
• [x] The documentation follows the Home Assistant documentation standards.

Summary by CodeRabbit

• Documentation
  • Enhanced documentation for the Habitica integration, including detailed descriptions of sensors, to-do lists, button controls, and API service parameters.
  • Expanded information on specific attributes like "Gems" and "Mystic hourglasses."
  • Improved guidance on managing tasks, including completion and editing.
  • Clarified button controls and their effects on character actions.
  • Updated API service section with usage details and examples.
  • Revised templating section for accessing user-specific task attributes.