remove declarations of copy/assignment operators that only do default work

user defined copy operators suppress compiler creation of move operations, and not having all of copy/move/dtor
defined (rule of 0/5) is suspicious. Also happens to be very slightly slower

include/xlnt/cell/index_types.hpp

@@ -92,26 +92,11 @@ public:
     /// </summary>
     column_t(const char *column_string);
 
-    /// <summary>
-    /// Copy constructor. Constructs a column by copying it from other.
-    /// </summary>
-    column_t(const column_t &other);
-
-    /// <summary>
-    /// Move constructor. Constructs a column by moving it from other.
-    /// </summary>
-    column_t(column_t &&other);
-
     /// <summary>
     /// Returns a string representation of this column index.
     /// </summary>
     std::string column_string() const;
 
-    /// <summary>
-    /// Sets this column to be the same as rhs's and return reference to self.
-    /// </summary>
-    column_t &operator=(column_t rhs);
-
     /// <summary>
     /// Sets this column to be equal to rhs and return reference to self.
     /// </summary>

include/xlnt/worksheet/range_reference.hpp

@@ -69,8 +69,6 @@ public:
     range_reference(column_t column_index_start, row_t row_index_start,
         column_t column_index_end, row_t row_index_end);
 
-    range_reference(const range_reference &ref);
-
     /// <summary>
     /// Returns true if the range has a width and height of 1 cell.
     /// </summary>

source/cell/index_types.cpp

@@ -109,27 +109,11 @@ column_t::column_t(const char *column_string)
 {
 }
 
-column_t::column_t(const column_t &other)
-    : column_t(other.index)
-{
-}
-
-column_t::column_t(column_t &&other)
-{
-    swap(*this, other);
-}
-
 std::string column_t::column_string() const
 {
     return column_string_from_index(index);
 }
 
-column_t &column_t::operator=(column_t rhs)
-{
-    swap(*this, rhs);
-    return *this;
-}
-
 column_t &column_t::operator=(const std::string &rhs)
 {
     return *this = column_t(rhs);

source/worksheet/range_reference.cpp

@@ -46,12 +46,6 @@ range_reference::range_reference(const char *range_string)
 {
 }
 
-range_reference::range_reference(const range_reference &ref)
-{
-    top_left_ = ref.top_left_;
-    bottom_right_ = ref.bottom_right_;
-}
-
 range_reference::range_reference(const std::string &range_string)
     : top_left_("A1"), bottom_right_("A1")
 {