Remove unused gem test task
Remove unused gem test task

firmanm/impressionist,samchen2009/impressionist,samchen2009/impressionist,firmanm/impressionist,charlotte-ruby/impressionist,guodongme/impressionist,charlotte-ruby/impressionist,samchen2009/impressionist,guodongme/impressionist,firmanm/impressionist,charlotte-ruby/impressionist,guodongme/impressionist