minor #509 Removed unused field (JeroenDeDauw)
minor #509 Removed unused field (JeroenDeDauw)

This PR was merged into the 5.2-dev branch.

Discussion
----------

Removed unused field

Commits
-------

845fa7a Removed unused field

denpamusic/swiftmailer,deguif/swiftmailer,papagel/swiftmailer,gburyakovsky/swiftmailer,Chhunlong/swiftmailer,gencer/swiftmailer,jamesggordon/swiftmailer,michabbb-backup/swiftmailer,fvosberg/swiftmailer,Rotzbua/swiftmailer,gburyakovsky/swiftmailer,robertklein/swiftmailer,voku/swiftmailer,Dubz/swiftmailer,tweakers-dev/swiftmailer,kuslahne/swiftmailer,fvosberg/swiftmailer,handautsav/swiftmailer,Rotzbua/swiftmailer,zghosts/swiftmailer,jamesggordon/swiftmailer,robertklein/swiftmailer,swiftmailer/swiftmailer,kuslahne/swiftmailer,michabbb-backup/swiftmailer,handautsav/swiftmailer,swiftmailer/swiftmailer,denpamusic/swiftmailer,papagel/swiftmailer,c960657/swiftmailer,zghosts/swiftmailer,c960657/swiftmailer,Chhunlong/swiftmailer,deguif/swiftmailer,voku/swiftmailer,Dubz/swiftmailer,tweakers-dev/swiftmailer,gencer/swiftmailer