Removed redundant constant "dockerConfigDir"
Removed redundant constant "dockerConfigDir"

Signed-off-by: Mikhail Zholobov <03bcc6525cbedbeb1a594ab158ed56fa91e0e8db@gmail.com>

Parallels/docker-machine,Kast0rTr0y/docker-machine,Parallels/docker-machine,Kast0rTr0y/docker-machine