try fixing build error

Author: j2kun

mlir/include/mlir/Dialect/Polynomial/IR/Polynomial.h

@@ -35,7 +35,7 @@ class MonomialBase {
 public:
   MonomialBase(const CoefficientType &coeff, const APInt &expo)
       : coefficient(coeff), exponent(expo) {}
-  virtual ~MonomialBase() = 0;
+  virtual ~MonomialBase() = default;
 
   const CoefficientType &getCoefficient() const { return coefficient; }
   CoefficientType &getMutableCoefficient() { return coefficient; }

mlir/lib/Dialect/Polynomial/IR/Polynomial.cpp

@@ -14,9 +14,6 @@
 namespace mlir {
 namespace polynomial {
 
-template <typename T>
-MonomialBase<T>::~MonomialBase() {}
-
 template <typename PolyT, typename MonomialT>
 FailureOr<PolyT> fromMonomialsImpl(ArrayRef<MonomialT> monomials) {
   // A polynomial's terms are canonically stored in order of increasing degree.