Remove special printing from the funptr views.
Remove special printing from the funptr views.

Function pointer printing is now supported directly in
Ctypes_type_printing.

dsheets/ocaml-ctypes,dsheets/ocaml-ctypes,ocamllabs/ocaml-ctypes,whitequark/ocaml-ctypes,sjfloat/ocaml-ctypes,yallop/ocaml-ctypes,whitequark/ocaml-ctypes,sjfloat/ocaml-ctypes,ocamllabs/ocaml-ctypes,whitequark/ocaml-ctypes,yallop/ocaml-ctypes,dsheets/ocaml-ctypes,sjfloat/ocaml-ctypes