Update 2015-09-28-conferences.md
Update 2015-09-28-conferences.md

remove mobile academy; it's been cancelled. ...
operasoftware/devopera,kenarai/devopera,operasoftware/devopera,shwetank/devopera,kenarai/devopera,andreasbovens/devopera,operasoftware/devopera,erikmaarten/devopera,operasoftware/devopera,erikmaarten/devopera,erikmaarten/devopera,erikmaarten/devopera,andreasbovens/devopera,kenarai/devopera,shwetank/devopera,shwetank/devopera,kenarai/devopera,andreasbovens/devopera