fix: throttle was removed from the ld2450 component

[firstof9]

Version:

What does this implement/fix?

Removes throttle from the LD2450 component as it was removed in 2025.8.0+ of ESPhome.

Types of changes

• Bugfix (fixed change that fixes an issue)
• New feature (thanks!)
• Breaking change (repair/feature that breaks existing functionality)
• Dependency Update - Does not publish
• Other - Does not publish
• Website of github readme file update - Does not publish
• Github workflows - Does not publish

Checklist / Checklijst:

• The code change has been tested and works locally
• The code change has not yet been tested

If user-visible functionality or configuration variables are added/modified:

• Added/updated documentation for the web page

[oerix]

Duplicate: #60