remove unnecessary includes
remove unnecessary includes

pol51/QXMPP-CMake,deepak899/qxmpp,KangLin/qxmpp,gotomypc/qxmpp,projedi/qxmpp-ffmpeg,trulabs/qxmpp-old,kollix/qxmpp,cccco/qxmpp,Ilyatk/qxmpp,gotomypc/qxmpp,kollix/qxmpp,gamenet/qxmpp_old,Kaffeine/qxmpp,Ilyatk/qxmpp,trulabs/qxmpp-old,gamenet/qxmpp_old,Kaffeine/qxmpp,gamenet/qxmpp,LightZam/qxmpp,trulabs/qxmpp-old,olesalscheider/qxmpp,cccco/qxmpp,Kaffeine/qxmpp,cccco/qxmpp,pol51/QXMPP-CMake,gamenet/qxmpp_old,unisontech/qxmpp,gotomypc/qxmpp,KangLin/qxmpp,deepak899/qxmpp,unisontech/qxmpp,ycsoft/qxmpp,olesalscheider/qxmpp,projedi/qxmpp-ffmpeg,olesalscheider/qxmpp,gamenet/qxmpp,Ilyatk/qxmpp,ycsoft/qxmpp,gamenet/qxmpp,deepak899/qxmpp,pol51/QXMPP-CMake,unisontech/qxmpp,LightZam/qxmpp,kollix/qxmpp,KangLin/qxmpp,LightZam/qxmpp,ycsoft/qxmpp