WordPress | Only run certain add_action init rules if related plugin is active

wordpress-add_action-init-is_plugin_active.php

<?php
// only run if TML plugin is active
add_action( 'init', 'fs_remove_tml_profile_fields');
function fs_remove_tml_profile_fields() {
	include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
	if ( is_plugin_active( 'theme-my-login/theme-my-login.php' ) ) {
	  	// remove the password hint helper text from the register and password reset forms
		tml_remove_form_field( 'register', 'indicator_hint' );
		tml_remove_form_field( 'resetpass', 'indicator_hint' );
	}
}