!15050 Fix compiling bug of Typecast in MindSpore lite

From: @tiancixiao
Reviewed-by: @heleiwang,@liucunwei,@liucunwei
Signed-off-by: @liucunwei,@liucunwei

mindspore/ccsrc/minddata/dataset/liteapi/include/transforms.h

@@ -205,10 +205,8 @@ class RandomChoice final : public TensorTransform {
 class TypeCast final : public TensorTransform {
  public:
   /// \brief Constructor.
-  /// \param[in] data_type mindspore.dtype to be cast to.
-  explicit TypeCast(std::string data_type) : TypeCast(StringToChar(data_type)) {}
-
-  explicit TypeCast(const std::vector<char> &data_type);
+  /// \param[in] data_type mindspore::DataType to be cast to.
+  explicit TypeCast(mindspore::DataType data_type);
 
   /// \brief Destructor
   ~TypeCast() = default;