Use delete instead of hiding copy constructors and assignments (#1820)

src/ArduinoJson/Document/JsonDocument.hpp

@@ -20,6 +20,9 @@ class JsonDocument : public detail::VariantOperators<const JsonDocument&> {
   friend class detail::VariantAttorney;
 
  public:
+  JsonDocument(const JsonDocument&) = delete;
+  JsonDocument& operator=(const JsonDocument&) = delete;
+
   // Casts the root to the specified type.
   // https://arduinojson.org/v6/api/jsondocument/as/
   template <typename T>
@@ -303,10 +306,6 @@ class JsonDocument : public detail::VariantOperators<const JsonDocument&> {
   detail::MemoryPool _pool;
   detail::VariantData _data;
 
- private:
-  JsonDocument(const JsonDocument&);
-  JsonDocument& operator=(const JsonDocument&);
-
  protected:
   detail::MemoryPool* getPool() {
     return &_pool;

src/ArduinoJson/Json/TextFormatter.hpp

@@ -22,6 +22,8 @@ class TextFormatter {
  public:
   explicit TextFormatter(TWriter writer) : _writer(writer) {}
 
+  TextFormatter& operator=(const TextFormatter&) = delete;
+
   // Returns the number of bytes sent to the TWriter implementation.
   size_t bytesWritten() const {
     return _writer.count();
@@ -166,9 +168,6 @@ class TextFormatter {
 
  protected:
   CountingDecorator<TWriter> _writer;
-
- private:
-  TextFormatter& operator=(const TextFormatter&);  // cannot be assigned
 };
 
 ARDUINOJSON_END_PRIVATE_NAMESPACE