refine iterator

paddle/operators/elementwise_op_function.h

@@ -131,61 +131,6 @@ class MidWiseTransformIterator<T, platform::CPUDeviceContext> {
   int post_;
 };
 
-template <typename T, typename Place>
-class ElementIterator;
-
-// Fixed(zcd) : Only support 2D
-template <typename T>
-class ElementIterator<T, platform::CPUDeviceContext> {
- public:
-  ElementIterator(const T* ptr, int t_m, int t_n, int m, int n)
-      : ptr_(ptr),
-        index_(0),
-        i_(0),
-        j_(0),
-        t_m_(t_m),
-        t_n_(t_n),
-        m_(m),
-        n_(n) {}
-
-  ElementIterator<T, platform::CPUDeviceContext>& operator++() {
-    ++j_;
-
-    if ((j_ == n_)) {
-      j_ = 0;
-      ++i_;
-    }
-    int t_i = (t_m_ == 1) ? 0 : i_;
-    int t_j = (t_n_ == 1) ? 0 : j_;
-    index_ = t_i * t_n_ + t_j;
-
-    return *this;
-  }
-
-  bool operator==(
-      const ElementIterator<T, platform::CPUDeviceContext>& rhs) const {
-    return (ptr_ + index_) == &(*rhs);
-  }
-
-  bool operator!=(
-      const ElementIterator<T, platform::CPUDeviceContext>& rhs) const {
-    return (ptr_ + index_) != &(*rhs);
-  }
-
-  const T& operator*() { return ptr_[index_]; }
-
- private:
-  // t_m_ == m_ || t_n_ == n_ || (t_m_ == 1 && t_m_ == 1)
-  const T* ptr_;
-  int index_;
-  int i_;
-  int j_;
-  int64_t t_m_;
-  int64_t t_n_;
-  int64_t m_;
-  int64_t n_;
-};
-
 #ifdef __NVCC__
 template <typename T>
 class RowwiseTransformIterator<T, platform::CUDADeviceContext>