Pre-request and test scripts still count towards summary totals after being removed.

[jordanwalsh23]

When pre-request and test scripts are removed from Postman, newman still counts these towards the summary totals in the CLI reporter.

1. Newman Version (can be found via newman -v): v5.3.0
2. OS details (type, version, and architecture): MacOS 11.6.8 (Big Sur) Intel
3. Are you using Newman as a library, or via the CLI? CLI
4. Did you encounter this recently, or has this bug always been there: Recently
5. Expected behaviour: Any scripts removed from Postman should not count towards the summary totals in the CLI reporter.
6. Command / script used to run Newman: newman run
7. Sample collection, and auxiliary files (minus the sensitive details): Any collection where the tests or pre-requests are entered, saved and then deleted.

Steps to reproduce the problem:

1. Create a collection with a single request in postman (no tests yet)
2. Export the collection
3. Run in newman - note the counts in the CLI reporter show '0' for both tests and pre-request scripts (image 1)
4. Update the request to have content in the pre-request and test scripts (e.g console.log).
5. Export the collection
6. Run in newman - note that the counts for the CLI reporter show '1' for both tests and pre-request scripts (image 2)
7. Update the request to remove the content from pre-request and test scripts so they are empty.
8. Export the collection
9. Run in newman - note that the counts for the CLI reporter still shows '1' for both tests and pre-request scripts (image 3)

[jordanwalsh23]

I believe this is because after the pre-request and test scripts are removed via Postman, the collection JSON still contains the following:

"event": [{
    "listen": "prerequest",
    "script": {
        "exec": [
            ""
        ],
        "type": "text/javascript"
    }
},
{
    "listen": "test",
    "script": {
        "exec": [
            ""
        ],
        "type": "text/javascript"
    }
}],

I believe the exec arrays are still being counted even though there is no executable javascript within these blocks.

If the event section is removed, the counts appear as expected.