remove_connection

# File activerecord/lib/active_record/connection_adapters/abstract/connection_specification.rb, line 277
    def self.remove_connection(klass=self)
      spec = @@defined_connections[klass.name]
      konn = active_connections[klass.name]
      @@defined_connections.delete_if { |key, value| value == spec }
      active_connections.delete_if { |key, value| value == konn }
      konn.disconnect! if konn
      spec.config if spec
    end