Revert "[API] Adds streams namespace and endpoints"

This reverts commit d0b99da.

Author: picandocodigo

elasticsearch-api/lib/elasticsearch/api.rb

@@ -87,8 +87,7 @@ def self.included(base)
                 Elasticsearch::API::Profiling,
                 Elasticsearch::API::Simulate,
                 Elasticsearch::API::Connector,
-                Elasticsearch::API::QueryRules,
-                Elasticsearch::API::Streams
+                Elasticsearch::API::QueryRules
     end
 
     # The serializer class