Removed stubbed out 'serialize' method (still working on).
Removed stubbed out 'serialize' method (still working on).

Opentrons/labware,OpenTrons/opentrons_sdk,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api