Fix MacOS compile error

The private data `tensor_shared_` is not used.

paddle/framework/tensor_array.h

@@ -47,13 +47,6 @@ class TensorArray {
   // max number of values allowed to store.
   const size_t MAX_SIZE{100000};
 
-  /*
-   * Inputs:
-   *   - value_shared: share memory between tensors.
-   */
-  explicit TensorArray(bool values_shared = true)
-      : values_shared_(values_shared) {}
-
   /*
    * Read the value at location `index` in the `TensorArray`.
    */
@@ -111,7 +104,6 @@ class TensorArray {
 
  private:
   mutable std::vector<LoDTensor> values_;
-  bool values_shared_;
 };  // class TensorArray
 
 }  // namespace framework