Travis: Remove FLTK installation for Linux (#159)
Travis: Remove FLTK installation for Linux (#159)

Since we won't be using FLTK anymore travis should not download the FLTK libraries in the environment.
ambah/KTAB,arunsathvik/KTAB,lsyaseen/KTAB,ambah/KTAB,arunsathvik/KTAB,KAPSARC/KTAB,lsyaseen/KTAB,amit133/KTAB,arunsathvik/KTAB,ambah/KTAB,amit133/KTAB,lsyaseen/KTAB,KAPSARC/KTAB,arunsathvik/KTAB,ambah/KTAB,amit133/KTAB,KAPSARC/KTAB,amit133/KTAB