Instead of defining the operator delete() function, it is better to d…

…elete the function so that any uses (even from within Node or its subclasses) do not accidentally call it. NFC intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248320 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/YAMLParser.h

@@ -158,7 +158,7 @@ class Node {
   std::unique_ptr<Document> &Doc;
   SMRange SourceRange;
 
-  void operator delete(void *) LLVM_NOEXCEPT {}
+  void operator delete(void *) LLVM_NOEXCEPT = delete;
 
   ~Node() = default;