[MLIR] Remove unused include. NFC.

Author: d0k

mlir/include/mlir/Interfaces/ControlFlowInterfaces.h

@@ -18,7 +18,6 @@
 #include "mlir/IR/Operation.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/Support/DebugLog.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace mlir {