QMakeStep: Fix compilation warning
QMakeStep: Fix compilation warning

Remove unused variable.

Change-Id: I8e060a8569edfa34483497188d480e624fc2c5fe
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@nokia.com>

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