How to edit a parent theme and save in child?

I am using Pro theme, but have inherited the website and do not have login credentials to ask on their forum. It’s a bit complicated, but I don’t think it’s theme-specific.

In the parent theme is the path
framework/legacy/functions/frontend/renew.php

In this file is the one line I want to edit. (I have edited it in the Parent theme and it works for my purposes, but I need to save it in my Child theme or I will lose my edit on next update.)

The code as it exists in that file:

if ( x_does_not_need_entry_meta() ) {
      return;
    } else {
      printf( '<p class="p-meta">%1$s%2$s%3$s%4$s</p>',
        $author,
        $date,
        $categories_list,
        $comments
      );
    }

  }
endif;

I simply want to remove the last two variables:

if ( x_does_not_need_entry_meta() ) {
      return;
    } else {
      printf( '<p class="p-meta">%1$s%2$s</p>',
        $author,
        $date,
        $categories_list,
        $comments
      );
    }

  }
endif;

I deleted them and saved the renew.php file in the same path in the Child theme, but that did not override the Parent theme.

I suspect I could put just this code into the Child’s function.php, but I’m not sure how.

Thank you for any help you can provide!