Remove unused SAPI_INTERNAL_UNREACHABLE
Remove unused SAPI_INTERNAL_UNREACHABLE

PiperOrigin-RevId: 483393540
Change-Id: I315da44529fb2c0d8b6b6347275fdf66c5aa4712

google/sandboxed-api,google/sandboxed-api,google/sandboxed-api,google/sandboxed-api