Remove unused #includes

libcdi

src/Adisit.cc

src/Afterburner.cc

src/Bitrounding.cc

src/CDIwrite.cc

src/CMakeLists.txt

src/Cat.cc

src/Collgrid.cc

src/Command.cc

src/Duplicate.cc

src/EOFs.cc

src/Echam5ini.cc

src/Ensstat3.cc

src/Ensval.cc

src/Eof3d.cc

src/Filter.cc

src/Fldstat2.cc

src/Fourier.cc

src/Gridboxstat.cc

src/Healpix.cc