Remove features from WordPress parent theme. Great for removing things like shortcodes.

functions.php

add_action( 'after_setup_theme', 'remove_parent_theme_features', 10 );
function remove_parent_theme_features(){
	// remove shortcode from parent theme
	remove_shortcode( 'example' );
	// replace with child theme shortcode callback
	add_shortcode( 'example', 'child_theme_example_callback' );
}