DEFEATURE: remove broken OFS surfaceFormat (issue #296, #294)

- This format is fortunately little-used (or never used) since its
  inception.

  Using raw stream operators to write zones, points and faces in a
  single file was not well thought out - the output content varies
  with the Face template type (face, triFace, labelledFace), which
  makes it not very robust at all.

  The static read in OFSsurfaceFormat also has a bug - keeping
  transcribed faces from being passed through.

  Conclusion: removing it makes more sense that repairing and still
  not having something good.

  Do retain stream operators for MeshedSurface and UnsortedMeshedSurface,
  since they are useful for passing around data
  (eg, between processors), but they shouldn't be used for files.