Remove unused gem

Author: mrcasals

lib/generators/heroku_installer.rb

@@ -67,7 +67,6 @@ def add_production_gems
         gem_group :production do
           gem "passenger"
           gem "fog-aws"
-          gem "aws-sdk-s3"
           gem "dalli"
           gem "sendgrid-ruby"
           gem "newrelic_rpm"