### 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)

"""Show Method Not Allowed on screen for any error in the Webserver"""
    return (
        render_template(
            "airflow/error.html",
            hostname=get_hostname() if conf.getboolean("webserver", "EXPOSE_HOSTNAME") else "redact",
            status_code=405,
            error_message="Received an invalid request.",
        ),
        405,
    )
def show_traceback(error):
    """Show Traceback for a given error"""
    return (
        render_template(
            "airflow/traceback.html",
            python_version=sys.version.split(" ")[0] if g.user.is_authenticated else "redact",
            airflow_version=version if g.user.is_authenticated else "redact",
            hostname=get_hostname()
            if conf.getboolean("webserver", "EXPOSE_HOSTNAME") and g.user.is_authenticated
            else "redact",
            info=traceback.format_exc()
            if conf.getboolean("webserver", "EXPOSE_STACKTRACE") and g.user.is_authenticated
            else "Error! Please contact server admin.",
        ),
        500,
    )
class AirflowBaseView(BaseView):