[CS] Remove an obsolete bit of logic
[CS] Remove an obsolete bit of logic

SILGen shouldn't care whether or not a self
parameter is wrapped in a paren with ownership.

glessard/swift,benlangmuir/swift,benlangmuir/swift,JGiola/swift,roambotics/swift,roambotics/swift,JGiola/swift,glessard/swift,roambotics/swift,benlangmuir/swift,apple/swift,JGiola/swift,benlangmuir/swift,roambotics/swift,benlangmuir/swift,apple/swift,apple/swift,apple/swift,JGiola/swift,apple/swift,glessard/swift,glessard/swift,JGiola/swift,benlangmuir/swift,apple/swift,JGiola/swift,glessard/swift,glessard/swift,roambotics/swift,roambotics/swift