Fixed warning on Clang 10

CHANGELOG.md

@@ -10,6 +10,7 @@ HEAD
 * Fixed clang-tidy warnings (issue #1574, PR #1577 by @armandas)
 * Added fake class `InvalidConversion<T1,T2>` to easily identify invalid conversions (issue #1585)
 * Added support for `std::string_view` (issue #1578, PR #1554 by @0xFEEDC0DE64)
+* Fixed warning `definition of implicit copy constructor for 'MsgPackDeserializer' is deprecated because it has a user-declared copy assignment operator`
 
 v6.18.0 (2021-05-05)
 -------

src/ArduinoJson/MsgPack/MsgPackDeserializer.hpp

@@ -32,9 +32,6 @@ class MsgPackDeserializer {
   }
 
  private:
-  // Prevent VS warning "assignment operator could not be generated"
-  MsgPackDeserializer &operator=(const MsgPackDeserializer &);
-
   bool invalidInput() {
     _error = DeserializationError::InvalidInput;
     return false;