Delete preinstalled pytest version 3.0.5
Delete preinstalled pytest version 3.0.5

ehartsuyker/securedrop,ehartsuyker/securedrop,micahflee/securedrop,micahflee/securedrop,conorsch/securedrop,conorsch/securedrop,ehartsuyker/securedrop,conorsch/securedrop,heartsucker/securedrop,garrettr/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,ageis/securedrop,conorsch/securedrop,garrettr/securedrop,micahflee/securedrop,heartsucker/securedrop,micahflee/securedrop,garrettr/securedrop,heartsucker/securedrop,garrettr/securedrop,conorsch/securedrop,ageis/securedrop,ageis/securedrop,ageis/securedrop