remove the duplicated part in troubleshooting section

The description of the first solution of the "code size too big" can be found both in the troubleshooting webpage and the previous README's troubleshooting section. The contents are similar, so we only need to keep the latest one. @seriousamlqz @kheradmand please review.
@kheradmand notice that "If you have access to the source code (.java files) of the program
-that you want to monitor,..."  occur twice.