Merge pull request #37597 from DougGregor/remove-yielding-continuation-5.5

Remove YieldingContinuation since that approach was disfavored to AsyncStream

Author: tkremenek

stdlib/public/Concurrency/CMakeLists.txt

@@ -71,7 +71,6 @@ add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
   TaskLocal.swift
   ThreadSanitizer.cpp
   Mutex.cpp
-  YieldingContinuation.swift
   ${swift_concurrency_objc_sources}
 
   SWIFT_MODULE_DEPENDS_LINUX Glibc