remove headerfile

Author: SusanTan

flang/lib/Optimizer/Dialect/CUF/CUFOps.cpp

@@ -24,7 +24,6 @@
 #include "mlir/IR/Matchers.h"
 #include "mlir/IR/OpDefinition.h"
 #include "mlir/IR/PatternMatch.h"
-#include "mlir/Interfaces/SideEffectInterfaces.h"
 #include "llvm/ADT/SmallVector.h"
 
 //===----------------------------------------------------------------------===//