pkg/jerryscript: cleanup Makefile.dep
pkg/jerryscript: cleanup Makefile.dep

There's no need to load dependency modules if the package is used. This is already managed by the build system

jasonatran/RIOT,smlng/RIOT,jasonatran/RIOT,OTAkeys/RIOT,authmillenon/RIOT,mtausig/RIOT,x3ro/RIOT,yogo1212/RIOT,josephnoir/RIOT,OlegHahm/RIOT,kaspar030/RIOT,x3ro/RIOT,basilfx/RIOT,basilfx/RIOT,toonst/RIOT,jasonatran/RIOT,x3ro/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,miri64/RIOT,RIOT-OS/RIOT,ant9000/RIOT,smlng/RIOT,josephnoir/RIOT,toonst/RIOT,jasonatran/RIOT,josephnoir/RIOT,kYc0o/RIOT,josephnoir/RIOT,kYc0o/RIOT,yogo1212/RIOT,aeneby/RIOT,mtausig/RIOT,basilfx/RIOT,ant9000/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,yogo1212/RIOT,aeneby/RIOT,smlng/RIOT,toonst/RIOT,kaspar030/RIOT,mtausig/RIOT,OTAkeys/RIOT,authmillenon/RIOT,kaspar030/RIOT,aeneby/RIOT,RIOT-OS/RIOT,ant9000/RIOT,OlegHahm/RIOT,authmillenon/RIOT,mtausig/RIOT,toonst/RIOT,kYc0o/RIOT,OTAkeys/RIOT,ant9000/RIOT,aeneby/RIOT,kYc0o/RIOT,miri64/RIOT,OlegHahm/RIOT,mtausig/RIOT,kaspar030/RIOT,aeneby/RIOT,OlegHahm/RIOT,yogo1212/RIOT,OTAkeys/RIOT,miri64/RIOT,toonst/RIOT,miri64/RIOT,basilfx/RIOT,ant9000/RIOT,josephnoir/RIOT,authmillenon/RIOT,kaspar030/RIOT,authmillenon/RIOT,authmillenon/RIOT,smlng/RIOT,smlng/RIOT,OlegHahm/RIOT,yogo1212/RIOT,x3ro/RIOT,x3ro/RIOT,basilfx/RIOT,miri64/RIOT,jasonatran/RIOT