RUBY-1237 Remove fallback to inline aggregate results for server 2.4
RUBY-1237 Remove fallback to inline aggregate results for server 2.4

mongodb/mongo-ruby-driver,saghm/mongo-ruby-driver,mongodb/mongo-ruby-driver,jonhyman/mongo-ruby-driver,saghm/mongo-ruby-driver,jonhyman/mongo-ruby-driver,mongodb/mongo-ruby-driver