try fix activestorage

Author: Sam Phippen

Gemfile-rails-dependencies

@@ -43,9 +43,6 @@ else
   if version >= '5-1-stable' && RUBY_VERSION  >= "1.9.3"
     gem "puma"
   end
-  if (version >= '5-2-stable' || version >= "5.2.0") && RUBY_VERSION  >= "1.9.3"
-    gem "activestorage"
-  end
 end
 
 gem "i18n", '< 0.7.0' if RUBY_VERSION < '1.9.3'

example_app_generator/generate_app.rb

@@ -29,7 +29,6 @@
   end
 
   if Rails::VERSION::STRING >= '5.2.0'
-    append_to_file("Gemfile", "gem 'activestorage'\n")
     copy_file sqlite_initializer, 'config/initializers/sqlite3_fix.rb'
   end