removed site title from the from_name
removed site title from the from_name

akhoury/nodebb-plugin-emailer-mandrill,julianlam/nodebb-plugin-emailer-mandrill,ashmehro/nodebb-plugin-emailer-sparkpost,rbeer/nodebb-plugin-emailer-mandrill,Linux-statt-Windows/nodebb-plugin-emailer-mandrill,psychobunny/nodebb-plugin-emailer-mandrill