rbutil: Fix some more issues found by clazy.

Change-Id: I0a1a849ecea4b4666b08ccb050eb17918e90a258

utils/rbutilqt/base/httpget.h

@@ -80,7 +80,6 @@ class HttpGet : public QObject
     signals:
         void done(bool);
         void dataReadProgress(int, int);
-        void requestFinished(int, bool);
         void headerFinished(void);
 
     private slots:

utils/rbutilqt/base/mspackutil.h

@@ -36,10 +36,6 @@ class MsPackUtil : public ArchiveUtil
         virtual bool extractArchive(const QString& dest, QString file = "");
         virtual QStringList files(void);
 
-    signals:
-       void logProgress(int, int);
-       void logItem(QString, int);
-
     private:
         QString errorStringMsPack(int error) const;
         struct mscab_decompressor* m_cabd;

utils/rbutilqt/base/utils.cpp

@@ -1053,11 +1053,11 @@ qint64 Utils::recursiveFolderSize(QString path)
 {
     qint64 size = 0;
     QList<QFileInfo> items = QDir(path).entryInfoList(QDir::Files | QDir::NoDotAndDotDot);
-    for (auto item: items) {
+    for (const auto &item: qAsConst(items)) {
         size += item.size();
     }
     QList<QString> folders = QDir(path).entryList(QDir::Dirs | QDir::NoDotAndDotDot);
-    for (auto const& folder: folders) {
+    for (auto const& folder: qAsConst(folders)) {
         size += recursiveFolderSize(path + "/" + folder);
     }
     return size;

utils/rbutilqt/base/ziputil.h

@@ -40,10 +40,6 @@ class ZipUtil : public ArchiveUtil
         qint64 totalUncompressedSize(unsigned int clustersize = 0);
         virtual QStringList files(void);
 
-    signals:
-       void logProgress(int, int);
-       void logItem(QString, int);
-
     private:
         QList<QuaZipFileInfo> contentProperties();
         QuaZip* m_zip;