DAGCombiner::LoadedSlice: Remove explicit copy ctor in favor of the Rule of Zero

This way, the copy assignment operator can be used without hitting the
deprecated case in C++11.

llvm-svn: 231144

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -9115,9 +9115,6 @@ struct LoadedSlice {
               unsigned Shift = 0, SelectionDAG *DAG = nullptr)
       : Inst(Inst), Origin(Origin), Shift(Shift), DAG(DAG) {}
 
-  LoadedSlice(const LoadedSlice &LS)
-      : Inst(LS.Inst), Origin(LS.Origin), Shift(LS.Shift), DAG(LS.DAG) {}
-
   /// \brief Get the bits used in a chunk of bits \p BitWidth large.
   /// \return Result is \p BitWidth and has used bits set to 1 and
   ///         not used bits set to 0.