Drop legacy cpp1 support for fboss/agent/hw/bcm/facebook/bcm_config.thrift
Drop legacy cpp1 support for fboss/agent/hw/bcm/facebook/bcm_config.thrift

Summary: [Fboss] Drop legacy cpp1 support for `fboss/agent/hw/bcm/facebook/bcm_config.thrift`.

Reviewed By: simpkins

Differential Revision: D4209870

fbshipit-source-id: b8fdee4a0b37e0ee7a268573af864f0ee4c6c6de

peterlei/fboss,peterlei/fboss,peterlei/fboss,peterlei/fboss