remove makefiles from the repo

[edwardhartnett]

The makefiles are no longer supported, and should be removed.

ed@Pooh-Bah:~/wgrib2$ find . -name '*makefile*'
./docs/README.makefile.upto.v3.0.0
./makefile.gctpc
./c_api/makefile
./makefile_hwrf
./lib/makefile
./makefile
./ftn_api/makefile
./g2clib-1.4.0/makefile
./wgrib2/gctpc/source/makefile.gctpc
./wgrib2/gctpc/source/makefile
./wgrib2/makefile
ed@Pooh-Bah:~/wgrib2$ find . -name '*Makefile*'
./sp_v2.0.2_d/Makefile
./iplib_hwrf/Makefile
./iplib.v3.0.0/Makefile
./ip2lib_d/Makefile
./wgrib2/gctpc/source/Makefile
./wgrib2/gctpc/test/test_proj/Makefile
ed@Pooh-Bah:~/wgrib2$ 

Proceed with care for the gctpc ones - not sure what is going on there.

[edwardhartnett]

We are leaving one makefile under gctpc...