Delete text from a Google slides using API

I' m trying to repetetive presentation with Google Slides starting from the events on Google Calendar using an API.

I was able to replace some text, but I'd like to delete all the text after the last text replacement. I've tried with replacing all the remaining text with a blank space, but i exceeded the quota limit, so maybe it's easier to just delete it.

(I hope it's understandable even in my broken english).

I hope you'll help me-

This is the function i use to replace the text (and it works fine):

def text_replace(old: str, new: str, presentation_id: str, pages: list = []):
    slides_service = build('slides', 'v1', credentials=creds)

    slides_service.presentations().batchUpdate(
        body={
            "requests": [
                {
                    "replaceAllText": {
                        "containsText": {
                            "text": '{{' + old + '}}'
                        },
                        "replaceText": new,
                        "pageObjectIds": pages,
                    }
                }
            ]
        },
        presentationId=presentation_id
    ).execute()

this is one of the slides i want to change

In the slide there's a single text box, and i wanted to know if it was possible to delete automatically some text