Woocommerce poor guys swiss knife conflict?

Hello, everyone.

I am using woocommerce poor guys swiss knife plugin, very good plugin with all the features i need.

However, i found below codes in the plugin may cause some conflicts with woocommerce.

function wcpgsk_clear_messages() {
	if ( function_exists('WC') && function_exists('wc_clear_notices') ) :
		wc_clear_notices();
	else :
		global $woocommerce;
		$woocommerce->clear_messages();
	endif;
}

I have to delete the IF part to avoid cart stock check issue. Have to keep the Function, otherwise causing error.

function wcpgsk_clear_messages() {
		global $woocommerce;
}

Below is the part of code in the plugin where i found the above code. Just wondering except above modification, is there any potential conflict with current version of woocommerce? Do i still need these codes in current version of woocommerce as it seems related to an old version of woommcerce (Handle functions deprecated in WooCommerce since 2.1.0 for WooCommerce installations < 2.1). Thanks.

Not sure if it is proper to post plugin code here, feel free to delete if not allowed.

/**
 * Handle functions deprecated in WooCommerce since 2.1.0 for WooCommerce installations < 2.1
 */
function wcpgsk_add_error( $error ) {
	if ( function_exists('WC') && function_exists('wc_add_notice') ) :
		wc_add_notice( $error, 'error');
	else :
		global $woocommerce;
		$woocommerce->add_error( $error );
	endif;
}

function wcpgsk_add_message( $message ) {
	if ( function_exists('WC') && function_exists('wc_add_notice') ) :
		wc_add_notice( $message );
	else :
		global $woocommerce;
		$woocommerce->add_message( $message );
	endif;
}

function wcpgsk_clear_messages() {
	if ( function_exists('WC') && function_exists('wc_clear_notices') ) :
		wc_clear_notices();
	else :
		global $woocommerce;
		$woocommerce->clear_messages();
	endif;
}

function wcpgsk_show_messages() {
	if ( function_exists('WC') && function_exists('wc_print_notices') ) :
		wc_print_notices();
	else :
		global $woocommerce;
		$woocommerce->show_messages();
	endif;
}

function wcpgsk_set_messages() {
	if ( !function_exists('WC') ) :
		global $woocommerce;
		$woocommerce->set_messages();
	endif;
}

https://www.ads-software.com/plugins/woocommerce/