Remove obsolete reference to securedrop-grsec package
Remove obsolete reference to securedrop-grsec package

GabeIsman/securedrop,kelcecil/securedrop,heartsucker/securedrop,harlo/securedrop,conorsch/securedrop,harlo/securedrop,kelcecil/securedrop,heartsucker/securedrop,ageis/securedrop,conorsch/securedrop,jeann2013/securedrop,jeann2013/securedrop,micahflee/securedrop,conorsch/securedrop,heartsucker/securedrop,chadmiller/securedrop,jrosco/securedrop,harlo/securedrop,garrettr/securedrop,GabeIsman/securedrop,jeann2013/securedrop,conorsch/securedrop,jaseg/securedrop,GabeIsman/securedrop,harlo/securedrop,jeann2013/securedrop,chadmiller/securedrop,kelcecil/securedrop,jaseg/securedrop,jrosco/securedrop,ehartsuyker/securedrop,chadmiller/securedrop,GabeIsman/securedrop,chadmiller/securedrop,jaseg/securedrop,jrosco/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,garrettr/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,ageis/securedrop,jrosco/securedrop,harlo/securedrop,kelcecil/securedrop,chadmiller/securedrop,kelcecil/securedrop,jaseg/securedrop,micahflee/securedrop,harlo/securedrop,chadmiller/securedrop,pwplus/securedrop,jaseg/securedrop,ageis/securedrop,ehartsuyker/securedrop,pwplus/securedrop,pwplus/securedrop,garrettr/securedrop,micahflee/securedrop,micahflee/securedrop,conorsch/securedrop,pwplus/securedrop,heartsucker/securedrop,jeann2013/securedrop,ageis/securedrop,ehartsuyker/securedrop,pwplus/securedrop,heartsucker/securedrop,jrosco/securedrop,GabeIsman/securedrop,jaseg/securedrop,pwplus/securedrop,kelcecil/securedrop,jrosco/securedrop,garrettr/securedrop,jeann2013/securedrop