functions.php

<?php

/**
 * Disable Inactive Plugins Nag on Synthesis
 *
 * @since 1.0.0
 */
function ea_disable_inactive_plugins_nag() {
  $disable = get_option( 'synthesis-plugin-snapshots-disable' );
	if ( ! $disable )
		update_option( 'synthesis-plugin-snapshots-disable', true );
} 
add_action( 'plugins_loaded', 'ea_disable_inactive_plugins_nag' );