Remove return for testfligt

Keep seeing these errors on travis-ci:
/Users/travis/.rvm/gems/ruby-2.0.0-p353/bundler/gems/shenzhen-99d99731a678/lib/shenzhen/plugins/testflight.rb:86:in
`block (2 levels) in <top (required)>': unexpected return
(LocalJumpError)
from
/Users/travis/.rvm/gems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commander/command.rb:180:in
`call'
from
/Users/travisavis/.rvm/gems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commander/command.rb:180:in
`call'
from
/Users/travis/.rvm/gems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commander/command.rb:155:in
`run'
from
/Users/travis/.rvm/gemsems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commander/runner.rb:421:in
`run_active_command'
from
/Users/travis/.rvm/gems/ruby-2.0.0-p353/gems/commander-421.2.0/lib/commander/runner.rb:81:in
`run!'
from
/Users/travis/.rvm/gems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commander/delegates.rb:8:in
`run!'
from
/Users/travis/.rvm/gems/ruby-2.0.0-p353/gems/commander-4.2.0/lib/commanderr/import.rb:10:in
`block in <top (required)>'
The command "bash -ev travis-scripts/distribute.sh" exited with 1.