remove TThreadedServer
remove TThreadedServer

Summary: TThreadedServer is deprecated and should not be used anymore.

Reviewed By: yfeldblum

Differential Revision: D26329647

fbshipit-source-id: 795511d7a6a4c976bfc24a948f46a9f5d97990a4

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift