remove overlapping `arbitrary` instances and `lazy`
remove overlapping `arbitrary` instances and `lazy`

mpurland/SwiftCheck,CodaFi/SwiftCheck,DanielAsher/SwiftCheck,CodaFi/SwiftCheck,ryanbooker/SwiftCheck,CodaFi/SwiftCheck,mpurland/SwiftCheck,DanielAsher/SwiftCheck,mpurland/SwiftCheck,robrix/SwiftCheck,robrix/SwiftCheck,kykim/SwiftCheck,typelift/SwiftCheck,typelift/SwiftCheck,typelift/SwiftCheck,CodaFi/SwiftCheck,CodaFi/SwiftCheck,typelift/SwiftCheck,ryanbooker/SwiftCheck,typelift/SwiftCheck,kykim/SwiftCheck