Remove compatibility from thrift/test:ExceptionThrowingIf
Remove compatibility from thrift/test:ExceptionThrowingIf

Summary: Currently Thrift tests are the last places that use cpp1 and compatibility mode, so I'm switching them to cpp2 and removing duplicates.

Reviewed By: yfeldblum, stevegury

Differential Revision: D7224672

fbshipit-source-id: 0db993275f0fdb16643784407e3fe08ee8faff1d

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