[Qt] remove unused formatBuildDate method

Author: jonasschnelli

src/qt/clientmodel.cpp

@@ -173,11 +173,6 @@ QString ClientModel::formatSubVersion() const
     return QString::fromStdString(strSubVersion);
 }
 
-QString ClientModel::formatBuildDate() const
-{
-    return QString::fromStdString(CLIENT_DATE);
-}
-
 bool ClientModel::isReleaseVersion() const
 {
     return CLIENT_VERSION_IS_RELEASE;

src/qt/clientmodel.h

@@ -72,7 +72,6 @@ class ClientModel : public QObject
 
     QString formatFullVersion() const;
     QString formatSubVersion() const;
-    QString formatBuildDate() const;
     bool isReleaseVersion() const;
     QString clientName() const;
     QString formatClientStartupTime() const;