Remove extend GraphQL::Subscriptions::SubscriptionRoot from docs
Remove extend GraphQL::Subscriptions::SubscriptionRoot from docs

nevesenin/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby,nevesenin/graphql-ruby,rmosolgo/graphql-ruby