Need to delete the sidebar widget area and have the page a full page rather than just have a blank widget area

There are many ways to make pages full width. In your case you just have deleted the sidebar widget but the sidebar is still exist. So if you have any template full width in your theme you can simply assign to the page.

If you are using elementor, you can use full width template by selecting page attribute
enter image description here

The other way is to copy page.php into tp-full-width.php. on the top of tpl-full-width.php assign any name

<?php /* Template Name: Full Width */ ?>

Now assign the template to the page you want as page attribute mentioned about in the image

Hope That work for you

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