minor #713 Deleted unused private method (edsonmedina)
minor #713 Deleted unused private method (edsonmedina)

This PR was merged into the 5.x branch.

Discussion
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Deleted unused private method

Commits
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3717ffd Deleted unused private method

swiftmailer/swiftmailer,voku/swiftmailer,c960657/swiftmailer,michabbb-backup/swiftmailer,jamesggordon/swiftmailer,voku/swiftmailer,Rotzbua/swiftmailer,tweakers-dev/swiftmailer,michabbb-backup/swiftmailer,Rotzbua/swiftmailer,denpamusic/swiftmailer,gencer/swiftmailer,denpamusic/swiftmailer,tweakers-dev/swiftmailer,jamesggordon/swiftmailer,gencer/swiftmailer,swiftmailer/swiftmailer,c960657/swiftmailer