diff --git a/src/mlpack/methods/ann/layer/dropout.hpp b/src/mlpack/methods/ann/layer/dropout.hpp
index 820b239a1d..939bd67d09 100644
--- a/src/mlpack/methods/ann/layer/dropout.hpp
+++ b/src/mlpack/methods/ann/layer/dropout.hpp
@@ -58,18 +58,6 @@ class DropoutType : public Layer<InputType, OutputType>
    */
   DropoutType(const double ratio = 0.5);
 
-  //! Copy Constructor.
-  DropoutType(const DropoutType& layer);
-
-  //! Move Constructor.
-  DropoutType(const DropoutType&&);
-
-  //! Copy assignment operator.
-  DropoutType& operator=(const DropoutType& layer);
-
-  //! Move assignment operator.
-  DropoutType& operator=(DropoutType&& layer);
-
   //! Clone the DropoutType object. This handles polymorphism correctly.
   DropoutType* Clone() const { return new DropoutType(*this); }
 
diff --git a/src/mlpack/methods/ann/layer/dropout_impl.hpp b/src/mlpack/methods/ann/layer/dropout_impl.hpp
index 92b6811d74..6f38c25822 100644
--- a/src/mlpack/methods/ann/layer/dropout_impl.hpp
+++ b/src/mlpack/methods/ann/layer/dropout_impl.hpp
@@ -28,50 +28,6 @@ DropoutType<InputType, OutputType>::DropoutType(
   // Nothing to do here.
 }
 
-template<typename InputType, typename OutputType>
-DropoutType<InputType, OutputType>::DropoutType(
-    const DropoutType& layer) :
-    ratio(layer.ratio),
-    scale(layer.scale)
-{
-  // Nothing to do here.
-}
-
-template<typename InputType, typename OutputType>
-DropoutType<InputType, OutputType>::DropoutType(
-    const DropoutType&& layer) :
-    ratio(std::move(layer.ratio)),
-    scale(std::move(scale))
-{
-  // Nothing to do here.
-}
-
-template<typename InputType, typename OutputType>
-DropoutType<InputType, OutputType>& DropoutType<InputType, OutputType>::
-operator=(const DropoutType& layer)
-{
-  if (this != &layer)
-  {
-    ratio = layer.ratio;
-    scale = layer.scale;
-  }
-
-  return *this;
-}
-
-template<typename InputType, typename OutputType>
-DropoutType<InputType, OutputType>& DropoutType<InputType, OutputType>::
-operator=(DropoutType&& layer)
-{
-  if (this != &layer)
-  {
-    ratio = std::move(layer.ratio);
-    scale = std::move(layer.scale);
-  }
-
-  return *this;
-}
-
 template<typename InputType, typename OutputType>
 void DropoutType<InputType, OutputType>::Forward(
     const InputType& input,