### Apache Airflow version

main (development)

### What happened

On the Task Instances table, one can click on `Edit Record` and be directed to a `Edit Task Instance` page. There, if you try to change the state, it will simply not update nor are there any errors in the browser console.


<img width="608" alt="Screen Shot 2022-01-04 at 10 10 52 AM" src="https://user-images.githubusercontent.com/4600967/148101472-fb6076fc-3fc3-44c4-a022-6625d5112551.png">


### What you expected to happen

Changes to state should actually update the task instance.

### How to reproduce

Try to use the `Edit Task Instance` page

### Operating System

Mac OSx

### Versions of Apache Airflow Providers

_No response_

### Deployment

Virtualenv installation

### Deployment details

_No response_

### Anything else

This page is redundant, as a user can successfully edit task instance states from the table. Instead of wiring up the correct actions, I say we should just remove the `Edit Task Instance` page entirely.

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

task_instance_to_delete = create_task_instance(
        task_id="test_task_instance_delete",
        execution_date=timezone.utcnow(),
        state=State.DEFERRED,
    )
    composite_key = _get_appbuilder_pk_string(TaskInstanceModelView, task_instance_to_delete)
    task_id = task_instance_to_delete.task_id
    assert session.query(TaskInstance).filter(TaskInstance.task_id == task_id).count() == 1
    admin_client.post(f"/taskinstance/delete/{composite_key}", follow_redirects=True)
    assert session.query(TaskInstance).filter(TaskInstance.task_id == task_id).count() == 0
def test_task_instance_delete_permission_denied(session, client_ti_without_dag_edit, create_task_instance):
    task_instance_to_delete = create_task_instance(
        task_id="test_task_instance_delete_permission_denied",
        execution_date=timezone.utcnow(),
        state=State.DEFERRED,
        session=session,
    )
    session.commit()
    composite_key = _get_appbuilder_pk_string(TaskInstanceModelView, task_instance_to_delete)
    task_id = task_instance_to_delete.task_id
    assert session.query(TaskInstance).filter(TaskInstance.task_id == task_id).count() == 1
    resp = client_ti_without_dag_edit.post(f"/taskinstance/delete/{composite_key}", follow_redirects=True)
    check_content_in_response(f"Access denied for dag_id {task_instance_to_delete.dag_id}", resp)
    assert session.query(TaskInstance).filter(TaskInstance.task_id == task_id).count() == 1
def test_task_instance_clear(session, admin_client):