clang-tidy: modernize-use-equals-default

ntcore/src/main/native/cpp/Message.h

@@ -38,7 +38,7 @@ class Message {
   };
   typedef std::function<NT_Type(unsigned int id)> GetEntryTypeFunc;
 
-  Message() {}
+  Message() = default;
   Message(MsgType type, const private_init&) : m_type(type) {}
 
   MsgType type() const { return m_type; }

ntcore/src/main/native/cpp/SequenceNumber.h

@@ -10,7 +10,7 @@ namespace nt {
 /* A sequence number per RFC 1982 */
 class SequenceNumber {
  public:
-  SequenceNumber() {}
+  SequenceNumber() = default;
   explicit SequenceNumber(unsigned int value) : m_value(value) {}
   unsigned int value() const { return m_value; }