Revoke multiple bonus boosts in a single request. Prevents future applications and removes from competitions where the boosting window hasn't opened.

Note: This endpoint is currently stubbed and returns 501 Not Implemented for API contract validation.

{
  "boostIds": [
    "12345678-1234-1234-1234-123456789012",
    "87654321-4321-4321-4321-210987654321"
  ]
}