Remove deprecation for page.on_resize

[InesaFitsner]

Duplicate Check

• I have searched the opened issues and there are no duplicates

Describe the bug

page.window.on_resized doesn't work for web and mobile so we need to remove deprecation for page.on_resize

Code

import flet as ft

def main(page: ft.Page):

    def page_resize(e):
        print("Page resize triggered")

    page.on_resize = page_resize

ft.app(main)

To reproduce

1. Run repro code -> page_resize is not triggered

Expected behavior

No response

Screenshots

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Operating System

macOS

Operating system details

macOS

Flet version

0.23.0

Regression

Yes, it used to work in a previous Flet version (please specify the version in additional details)

Suggestions

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Additional details

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