[Parse] Remove dead condition
[Parse] Remove dead condition

We used to avoid parsing labels for yield stmts
by passing in `SyntaxKind::YieldStmt` and relying
on this condition. However we no longer do so, we
pass `SyntaxKind::ExprList` instead.

benlangmuir/swift,xwu/swift,roambotics/swift,rudkx/swift,benlangmuir/swift,ahoppen/swift,gregomni/swift,gregomni/swift,xwu/swift,ahoppen/swift,roambotics/swift,ahoppen/swift,apple/swift,gregomni/swift,benlangmuir/swift,gregomni/swift,ahoppen/swift,rudkx/swift,glessard/swift,atrick/swift,xwu/swift,JGiola/swift,ahoppen/swift,atrick/swift,gregomni/swift,apple/swift,JGiola/swift,JGiola/swift,glessard/swift,roambotics/swift,xwu/swift,JGiola/swift,rudkx/swift,xwu/swift,benlangmuir/swift,apple/swift,ahoppen/swift,glessard/swift,atrick/swift,glessard/swift,atrick/swift,roambotics/swift,xwu/swift,glessard/swift,JGiola/swift,apple/swift,atrick/swift,rudkx/swift,benlangmuir/swift,roambotics/swift,JGiola/swift,roambotics/swift,xwu/swift,rudkx/swift,apple/swift,gregomni/swift,glessard/swift,rudkx/swift,atrick/swift,benlangmuir/swift,apple/swift