Remove needless postfix install.
Remove needless postfix install.

propeoplemd/cibox,ygerasimov/cibox-1,valthebald/cibox,ygerasimov/cibox-1,loganyott/cibox,turcan-vasile/cibox,valthebald/cibox,valthebald/cibox,turcan-vasile/cibox,PavelLoparev/cibox,turcan-vasile/cibox,propeopleua/cibox,ygerasimov/cibox-1,propeoplemd/cibox,ey-/cibox,turcan-vasile/cibox,tkyryliuk/cibox,PavelLoparev/cibox,tkyryliuk/cibox,PavelLoparev/cibox,dpovshed/cibox,ey-/cibox,Sanchiz/cibox,dpovshed/cibox,Sanchiz/cibox,propeopleua/cibox,tkyryliuk/cibox,dpovshed/cibox,dpovshed/cibox,ey-/cibox,propeoplemd/cibox,ey-/cibox,loganyott/cibox,turcan-vasile/cibox,propeopleua/cibox,turcan-vasile/cibox,tkyryliuk/cibox,PavelLoparev/cibox,valthebald/cibox,loganyott/cibox,Sanchiz/cibox,propeopleua/cibox,ey-/cibox,tkyryliuk/cibox,loganyott/cibox,ygerasimov/cibox-1,loganyott/cibox,ygerasimov/cibox-1,propeoplemd/cibox,Sanchiz/cibox,PavelLoparev/cibox,propeopleua/cibox,propeoplemd/cibox,Sanchiz/cibox,loganyott/cibox,PavelLoparev/cibox,tkyryliuk/cibox,valthebald/cibox,dpovshed/cibox,dpovshed/cibox,Sanchiz/cibox