ZOOKEEPER-2993: Removed 'generated' line from .gitignore
Author: asutosh936 <asutosh.pandya@hotmail.com>
Reviewers: Abraham Fine <afine@apache.org>, Andor Molnár <andor@cloudera.com>, Michael Han <hanm@apache.org>
Closes #488 from asutosh936/ZOOKEEPER-2993
asutosh936