Delete leftover secret_token.rb
Delete leftover secret_token.rb

This initializer was removed with 4.1, not sure why it
was still around. We rely on secrets.yml now.

friism/orientation,jefmathiot/orientation,liufffan/orientation,codio/orientation,Scripted/orientation,twinn/orientation,twinn/orientation,smashingboxes/orientation,codeschool/orientation,splicers/orientation,ferdinandrosario/orientation,robomc/orientation,liufffan/orientation,hashrocket/orientation,orientation/orientation,IZEA/orientation,ferdinandrosario/orientation,IZEA/orientation,friism/orientation,Scripted/orientation,cmckni3/orientation,robomc/orientation,orientation/orientation,jefmathiot/orientation,splicers/orientation,orientation/orientation,hashrocket/orientation,codeschool/orientation,splicers/orientation,LogicalBricks/orientation,cmckni3/orientation,orientation/orientation,codeschool/orientation,codio/orientation,smashingboxes/orientation,LogicalBricks/orientation,cmckni3/orientation,Scripted/orientation