Remove installation.d from build-files.txt.
Remove installation.d from build-files.txt.

alexeibs/dub,rjframe/dub,jeanbaptistelab/dub,Flamaros/dub,schuetzm/dub,xentec/dub,nazriel/dub,Geod24/dub,y12uc231/dub,dreamsxin/dub,p0nce/dub,grogancolin/dub,gedaiu/dub,Abscissa/dub,Abscissa/dub-data-mod,jelmansouri/dub,D-Programming-Language/dub