Hi@akhtar,
You can use the ec2_key module in your playbook. In this module, you have to set state value as absent. I have attached one playbook below for your reference.
- hosts: localhost
  tasks:
  - name: Remove key pair
    ec2_key:
      name: my_keypair
      region: ap-south-1
      state: absent
      aws_access_key: 
      aws_secret_key: