[llvm] [NFC][TableGen] Code cleanup in Record.h/cpp (PR #138876)

[Pengcheng Wang via llvm-commits]

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@@ -19,6 +19,7 @@
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/STLExtras.h"
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wangpc-pp wrote:

Do we need this include?

https://github.com/llvm/llvm-project/pull/138876