rbutil: Always use svg icon for Window icon.

Since we now have svg support enabled (and used) for all platforms we
can simply use the svg one, and bring it in line with the rest of the
icon.

Change-Id: If99f1be0205de1a87eb727c33400811620d9876d

rbutil/rbutilqt/rbutilqt.cpp

@@ -88,20 +88,8 @@ RbUtilQt::RbUtilQt(QWidget *parent) : QMainWindow(parent)
     HttpGet::setGlobalProxy(proxy());
     // init startup & autodetection
     ui.setupUi(this);
-#if defined(Q_OS_LINUX)
     QIcon windowIcon(":/icons/rockbox-clef.svg");
     this->setWindowIcon(windowIcon);
-#endif
-#if defined(Q_OS_WIN32)
-    QIcon windowIcon = QIcon();
-    windowIcon.addFile(":/icons/rockbox-16.png");
-    windowIcon.addFile(":/icons/rockbox-32.png");
-    windowIcon.addFile(":/icons/rockbox-48.png");
-    windowIcon.addFile(":/icons/rockbox-64.png");
-    windowIcon.addFile(":/icons/rockbox-128.png");
-    windowIcon.addFile(":/icons/rockbox-256.png");
-    this->setWindowIcon(windowIcon);
-#endif
 #if defined(Q_OS_MACX)
     // don't translate menu entries that are handled specially on OS X
     // (Configure, Quit). Qt handles them for us if they use english string.

rbutil/rbutilqt/rbutilqt.qrc

@@ -33,13 +33,6 @@
         <file>icons/preferences-desktop-locale.svg</file>
         <file>icons/preferences-system.svg</file>
         <file>icons/process-stop.svg</file>
-        <file>icons/rblogo.png</file>
-        <file>icons/rockbox-16.png</file>
-        <file>icons/rockbox-32.png</file>
-        <file>icons/rockbox-48.png</file>
-        <file>icons/rockbox-64.png</file>
-        <file>icons/rockbox-128.png</file>
-        <file>icons/rockbox-256.png</file>
         <file>icons/system-search.svg</file>
         <file>icons/user-trash-full.svg</file>
         <file>icons/view-refresh.svg</file>