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/**
 * Code goes in functions.php or a custom plugin.
 */
add_action( 'woocommerce_email', 'unhook_those_pesky_emails' );

function unhook_those_pesky_emails( $email_class ) {

		/**
		 * Hooks for sending emails during store events
		 **/
		remove_action( 'woocommerce_low_stock_notification', array( $email_class, 'low_stock' ) );
		remove_action( 'woocommerce_no_stock_notification', array( $email_class, 'no_stock' ) );
		remove_action( 'woocommerce_product_on_backorder_notification', array( $email_class, 'backorder' ) );
		
		// New order emails
		remove_action( 'woocommerce_order_status_pending_to_processing_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_pending_to_completed_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_pending_to_on-hold_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_failed_to_processing_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_failed_to_completed_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_failed_to_on-hold_notification', array( $email_class->emails['WC_Email_New_Order'], 'trigger' ) );
		
		// Processing order emails
		remove_action( 'woocommerce_order_status_pending_to_processing_notification', array( $email_class->emails['WC_Email_Customer_Processing_Order'], 'trigger' ) );
		remove_action( 'woocommerce_order_status_pending_to_on-hold_notification', array( $email_class->emails['WC_Email_Customer_Processing_Order'], 'trigger' ) );
		
		// Completed order emails
		remove_action( 'woocommerce_order_status_completed_notification', array( $email_class->emails['WC_Email_Customer_Completed_Order'], 'trigger' ) );
			
		// Note emails
		remove_action( 'woocommerce_new_customer_note_notification', array( $email_class->emails['WC_Email_Customer_Note'], 'trigger' ) );
}