Remove deprecated `ClosureCaptureSyntax` initializer with `assignToken`#2795

ahoppen merged 1 commit intoswiftlang:mainswiftlang/swift-syntax:mainfrom

MAJKFL:disambiguate-closure-capture-syntax-initializerMAJKFL/swift-syntax:disambiguate-closure-capture-syntax-initializerCopy head branch name to clipboard