Remove unused QDateTime in KConfigBackend.

Spotted because it leads to race conditions due to tzset
(surely a Qt bug, but anyway no point in finding out lastModified
for nothing).

While at it, remove the unused size field as well.

src/core/kconfigbackend.cpp

@@ -38,8 +38,6 @@ typedef QExplicitlySharedDataPointer<KConfigBackend> BackendPtr;
 class KConfigBackendPrivate
 {
 public:
-    qint64 size;
-    QDateTime lastModified;
     QString localFileName;
 
     static QString whatSystem(const QString & /*fileName*/)
@@ -93,26 +91,6 @@ KConfigBackend::~KConfigBackend()
     delete d;
 }
 
-QDateTime KConfigBackend::lastModified() const
-{
-    return d->lastModified;
-}
-
-void KConfigBackend::setLastModified(const QDateTime &dt)
-{
-    d->lastModified = dt;
-}
-
-qint64 KConfigBackend::size() const
-{
-    return d->size;
-}
-
-void KConfigBackend::setSize(qint64 sz)
-{
-    d->size = sz;
-}
-
 QString KConfigBackend::filePath() const
 {
     return d->localFileName;

src/core/kconfigbackend_p.h

@@ -34,7 +34,6 @@ class KConfigBackendPrivate;
 class KEntryMap;
 class QFile;
 class QByteArray;
-class QDateTime;
 
 /**
  * \class KConfigBackend kconfigbackend_p.h <KConfigBackend>
@@ -181,19 +180,11 @@ public:
      */
     virtual bool isLocked() const = 0;
 
-    /**
-     * @return the date and time when the object was last modified
-     */
-    QDateTime lastModified() const;
     /** @return the absolute path to the object */
     QString filePath() const;
-    /** @return the size of the object */
-    qint64 size() const;
 
 protected:
     KConfigBackend();
-    void setLastModified(const QDateTime &dt);
-    void setSize(qint64 sz);
     void setLocalFilePath(const QString &file);
 
 private:

src/core/kconfigini.cpp

@@ -600,14 +600,8 @@ void KConfigIniBackend::setFilePath(const QString &file)
     const QFileInfo info(file);
     if (info.exists()) {
         setLocalFilePath(info.canonicalFilePath());
-        setLastModified(info.lastModified());
-        setSize(info.size());
     } else {
         setLocalFilePath(file);
-        setSize(0);
-        QDateTime dummy;
-        dummy.setTime_t(0);
-        setLastModified(dummy);
     }
 }