remove_editor.php

add_action('init', 'crb_remove_editor_init');

function crb_remove_editor_init() {
	if (!is_admin()) {
	   return;
	}

	$current_post_id = filter_input( INPUT_GET, 'post', FILTER_SANITIZE_NUMBER_INT );

	$update_post_id = filter_input( INPUT_POST, 'post_ID', FILTER_SANITIZE_NUMBER_INT );

	if ( isset( $current_post_id ) ) {
	   $post_id = absint( $current_post_id );
	} else if ( isset( $update_post_id ) ) {
	   $post_id = absint( $update_post_id );
	} else {
	   return;
	}

	if ( isset( $post_id ) ) {
	   $template_file = get_post_meta( $post_id, '_wp_page_template', true );

	   if (('templates/home.php' === $template_file || 'templates/landing.php' === $template_file)) {
		   remove_post_type_support( 'page', 'editor' );
	   }
	}
}