Hide the WordPress editor on specific pages. This example looks for a page's name or a page template. The code goes in your functions.php file.

hide_editor.php

<?php

// Hide Editor on Select Pages
function s25_hide_editor() {
	// Get the Post ID.
	$post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'] ;
	if( !isset( $post_id ) ) return;

	// Hide the editor on the page titled 'Homepage'
	$homepgname = get_the_title($post_id);
	if($homepgname == 'Homepage'){
		remove_post_type_support('page', 'editor');
	}

	// Hide the editor on a page with a specific page template
	// Get the name of the Page Template file.
	$template_file = get_post_meta($post_id, '_wp_page_template', true);

	if($template_file == 'page-template-sponsors.php'){ // the filename of the page template
		remove_post_type_support('page', 'editor');
	}
}

add_action( 'admin_init', 's25_hide_editor' );