Fix -Weffc++ warnings (GNU 6.3.1)

src/json.hpp

@@ -6172,21 +6172,6 @@ class basic_json
               thousands_sep(!loc->thousands_sep ? '\0' : loc->thousands_sep[0]),
               decimal_point(!loc->decimal_point ? '\0' : loc->decimal_point[0])
         {}
-        serializer(const serializer& cpy)
-            : o(cpy.o),
-              thousands_sep(cpy.thousands_sep),
-              decimal_point(cpy.decimal_point),
-              loc(cpy.loc),
-              indent_string(cpy.indent_string)
-        {}
-        serializer& operator=(const serializer& rhs) {
-            o = rhs.o;
-            thousands_sep = rhs.thousands_sep;
-            decimal_point = rhs.decimal_point;
-            loc = rhs.loc;
-            indent_string = rhs.indent_string;
-            return *this;
-        }
 
         /*!
         @brief internal implementation of the serialization function

src/json.hpp.re2c

@@ -6172,21 +6172,6 @@ class basic_json
               thousands_sep(!loc->thousands_sep ? '\0' : loc->thousands_sep[0]),
               decimal_point(!loc->decimal_point ? '\0' : loc->decimal_point[0])
         {}
-        serializer(const serializer& cpy)
-            : o(cpy.o),
-              thousands_sep(cpy.thousands_sep),
-              decimal_point(cpy.decimal_point),
-              loc(cpy.loc),
-              indent_string(cpy.indent_string)
-        {}
-        serializer& operator=(const serializer& rhs) {
-            o = rhs.o;
-            thousands_sep = rhs.thousands_sep;
-            decimal_point = rhs.decimal_point;
-            loc = rhs.loc;
-            indent_string = rhs.indent_string;
-            return *this;
-        }
 
         /*!
         @brief internal implementation of the serialization function