Removed unused function
Removed unused function

Usage of mapDeviceToDriveLetter(QString *) was being removed in c5a40e9e63

Change-Id: I4b0ba6f0b26df4997a9ed24cc06d9cc6da3eedc9
Reviewed-on: http://codereview.qt-project.org/4761
Reviewed-by: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Friedemann Kleint <1b9f2592239daaec4856ccc1cfb4d2d55b35fb71@nokia.com>

azat/qtcreator,richardmg/qtcreator,hdweiss/qt-creator-visualizer,AltarBeastiful/qt-creator,syntheticpp/qt-creator,malikcjm/qtcreator,syntheticpp/qt-creator,colede/qtcreator,hdweiss/qt-creator-visualizer,richardmg/qtcreator,darksylinc/qt-creator,richardmg/qtcreator,Distrotech/qtcreator,ostash/qt-creator-i18n-uk,xianian/qt-creator,farseerri/git_code,ostash/qt-creator-i18n-uk,hdweiss/qt-creator-visualizer,duythanhphan/qt-creator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,KDE/android-qt-creator,hdweiss/qt-creator-visualizer,KDAB/KDAB-Creator,hdweiss/qt-creator-visualizer,richardmg/qtcreator,malikcjm/qtcreator,amyvmiwei/qt-creator,farseerri/git_code,Distrotech/qtcreator,omniacreator/qtcreator,AltarBeastiful/qt-creator,duythanhphan/qt-creator,darksylinc/qt-creator,azat/qtcreator,colede/qtcreator,xianian/qt-creator,xianian/qt-creator,maui-packages/qt-creator,farseerri/git_code,darksylinc/qt-creator,jonnor/qt-creator,maui-packages/qt-creator,martyone/sailfish-qtcreator,syntheticpp/qt-creator,syntheticpp/qt-creator,kuba1/qtcreator,colede/qtcreator,kuba1/qtcreator,KDE/android-qt-creator,syntheticpp/qt-creator,maui-packages/qt-creator,KDE/android-qt-creator,ostash/qt-creator-i18n-uk,richardmg/qtcreator,malikcjm/qtcreator,darksylinc/qt-creator,syntheticpp/qt-creator,bakaiadam/collaborative_qt_creator,colede/qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,bakaiadam/collaborative_qt_creator,azat/qtcreator,Distrotech/qtcreator,omniacreator/qtcreator,hdweiss/qt-creator-visualizer,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,Distrotech/qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,KDAB/KDAB-Creator,danimo/qt-creator,ostash/qt-creator-i18n-uk,KDE/android-qt-creator,omniacreator/qtcreator,omniacreator/qtcreator,martyone/sailfish-qtcreator,jonnor/qt-creator,duythanhphan/qt-creator,amyvmiwei/qt-creator,bakaiadam/collaborative_qt_creator,martyone/sailfish-qtcreator,KDE/android-qt-creator,danimo/qt-creator,danimo/qt-creator,darksylinc/qt-creator,amyvmiwei/qt-creator,Distrotech/qtcreator,malikcjm/qtcreator,amyvmiwei/qt-creator,malikcjm/qtcreator,kuba1/qtcreator,KDAB/KDAB-Creator,ostash/qt-creator-i18n-uk,danimo/qt-creator,duythanhphan/qt-creator,bakaiadam/collaborative_qt_creator,Distrotech/qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,omniacreator/qtcreator,duythanhphan/qt-creator,farseerri/git_code,richardmg/qtcreator,kuba1/qtcreator,kuba1/qtcreator,darksylinc/qt-creator,malikcjm/qtcreator,maui-packages/qt-creator,xianian/qt-creator,danimo/qt-creator,jonnor/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,azat/qtcreator,farseerri/git_code,farseerri/git_code,danimo/qt-creator,farseerri/git_code,jonnor/qt-creator,darksylinc/qt-creator,martyone/sailfish-qtcreator,colede/qtcreator,KDE/android-qt-creator,duythanhphan/qt-creator,ostash/qt-creator-i18n-uk,kuba1/qtcreator,omniacreator/qtcreator,bakaiadam/collaborative_qt_creator,richardmg/qtcreator,omniacreator/qtcreator,kuba1/qtcreator,KDAB/KDAB-Creator,jonnor/qt-creator,xianian/qt-creator,danimo/qt-creator,xianian/qt-creator,xianian/qt-creator,bakaiadam/collaborative_qt_creator,KDAB/KDAB-Creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,malikcjm/qtcreator,jonnor/qt-creator,kuba1/qtcreator,danimo/qt-creator,bakaiadam/collaborative_qt_creator,xianian/qt-creator,maui-packages/qt-creator,maui-packages/qt-creator,ostash/qt-creator-i18n-uk,xianian/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,syntheticpp/qt-creator,azat/qtcreator,colede/qtcreator,KDAB/KDAB-Creator,AltarBeastiful/qt-creator,KDE/android-qt-creator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,maui-packages/qt-creator,KDE/android-qt-creator,kuba1/qtcreator,Distrotech/qtcreator,azat/qtcreator