[FEA]: Remove batched ego graphs

[jnke2016]

Is this a new feature, an improvement, or a change to existing functionality?

Improvement

How would you describe the priority of this feature request

Low (would be nice)

Please provide a clear description of problem this feature solves

Batched ego_graphs is deprecated and the support for multi seeds is handled by the function ego_graph

Describe your ideal solution

Remove the function batched_ego_graphs

Describe any alternatives you have considered

No response

Additional context

No response

Code of Conduct

• [x] I agree to follow cuGraph's Code of Conduct
• [x] I have searched the open feature requests and have found no duplicates for this feature request