fix(backend): Remove croniter

[majdyz]

Croniter is unused, and it will be deprecated soon.

Changes 🏗️

Remove croniter.

Checklist 📋

For code changes:

• I have clearly listed my changes in the PR description
• I have made a test plan
• I have tested my changes according to the test plan:
  • ...

Example test plan

• Create from scratch and execute an agent with at least 3 blocks
• Import an agent from file upload, and confirm it executes correctly
• Upload agent to marketplace
• Import an agent from marketplace and confirm it executes correctly
• Edit an agent from monitor, and confirm it executes correctly

For configuration changes:

• .env.example is updated or already compatible with my changes
• docker-compose.yml is updated or already compatible with my changes
• I have included a list of my configuration changes in the PR description (under Changes)

Examples of configuration changes

• Changing ports
• Adding new services that need to communicate with each other
• Secrets or environment variable changes
• New or infrastructure changes such as databases

[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ No major issues detected

[netlify]

✅ Deploy Preview for auto-gpt-docs-dev canceled.

Name	Link
🔨 Latest commit	876668a
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs-dev/deploys/676dc174319983000878d8f3

[netlify]

✅ Deploy Preview for auto-gpt-docs ready!

Name	Link
🔨 Latest commit	876668a
🔍 Latest deploy log	https://app.netlify.com/sites/auto-gpt-docs/deploys/676dc1741ca1b00008ae5fe8
😎 Deploy Preview	https://deploy-preview-9130--auto-gpt-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.