Revert "Avoid a stack overflow when dealing with long chains of unwrapped tasks"

This reverts commit 4879059.

Author: Amanieu

include/async++/task_base.h

@@ -489,10 +489,7 @@ void unwrapped_finish(task_base* parent_base, Child child_task)
 	// Set up a continuation on the child to set the result of the parent
 	LIBASYNC_TRY {
 		parent_base->add_ref();
-
-		// We can't use inline_scheduler here because a long chain of unwrapped
-		// tasks could cause a stack overflow.
-		child_task.then(unwrapped_func<Result, Child>(task_ptr(parent_base)));
+		child_task.then(inline_scheduler(), unwrapped_func<Result, Child>(task_ptr(parent_base)));
 	} LIBASYNC_CATCH(...) {
 		// Use cancel_base here because the function object is already destroyed.
 		static_cast<task_result<Result>*>(parent_base)->cancel_base(std::current_exception());