Declare empty constructor as default

src/blackmisc/aviation/airport.cpp

@@ -24,9 +24,6 @@ BLACK_DEFINE_VALUEOBJECT_MIXINS(BlackMisc::Aviation, CAirport)
 
 namespace BlackMisc::Aviation
 {
-    CAirport::CAirport()
-    { }
-
     CAirport::CAirport(const QString &icao)  :
         m_icao(icao)
     { }

src/blackmisc/aviation/airport.h

@@ -52,7 +52,7 @@ namespace BlackMisc::Aviation
         };
 
         //! Default constructor.
-        CAirport();
+        CAirport() = default;
 
         //! Simplified constructor
         CAirport(const QString &icao);

src/blackmisc/aviation/airportlist.cpp

@@ -18,8 +18,6 @@ BLACK_DEFINE_SEQUENCE_MIXINS(BlackMisc::Aviation, CAirport, CAirportList)
 
 namespace BlackMisc::Aviation
 {
-    CAirportList::CAirportList() { }
-
     CAirportList::CAirportList(const CSequence<CAirport> &other) :
         CSequence<CAirport>(other)
     { }

src/blackmisc/aviation/airportlist.h

@@ -37,7 +37,7 @@ namespace BlackMisc::Aviation
         using CSequence::CSequence;
 
         //! Default constructor.
-        CAirportList();
+        CAirportList() = default;
 
         //! Construct from a base class object.
         CAirportList(const CSequence<CAirport> &other);