Remove QT_NO_FILEICONPROVIDER ifdefs

FILEICONPROVIDER isn't listed in qfeatures.txt and Qt doesn't
build without it.

If you need QT_NO_FILEICONPROVIDER, besides reverting this commit,
you'll need to add a good amount of ifdefs to QFileDialog,
QFileSystemModel and QFileInfoGatherer classes.

Change-Id: Ic288c90268f6a900e160ba8eb4457580d1fd7a5a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

src/widgets/itemviews/qfileiconprovider.cpp

@@ -41,7 +41,6 @@
 
 #include "qfileiconprovider.h"
 
-#ifndef QT_NO_FILEICONPROVIDER
 #include <qstyle.h>
 #include <qapplication.h>
 #include <qdir.h>
@@ -428,5 +427,3 @@ QString QFileIconProvider::type(const QFileInfo &info) const
 }
 
 QT_END_NAMESPACE
-
-#endif

src/widgets/itemviews/qfileiconprovider.h

@@ -49,8 +49,6 @@
 QT_BEGIN_NAMESPACE
 
 
-#ifndef QT_NO_FILEICONPROVIDER
-
 class QFileIconProviderPrivate;
 
 class Q_WIDGETS_EXPORT QFileIconProvider
@@ -78,11 +76,8 @@ private:
     Q_DISABLE_COPY(QFileIconProvider)
 };
 
-#endif // QT_NO_FILEICONPROVIDER
-
 Q_DECLARE_OPERATORS_FOR_FLAGS(QFileIconProvider::Options)
 
 QT_END_NAMESPACE
 
 #endif // QFILEICONPROVIDER_H
-