Q_WS_X11 and Q_WX_QWS haven't been defined for years and the code
doesn't build any more.
Given this has been broken for years without anyone noticing it should
be safe to remove
We currently need the lookandfeel and style kcm in plasma-workspace, but
appearantly they depend on the krdb so best solution is to move all kcms
together
They are taken from plasma-desktop at the commit :
8447c08e878ccbde9c5516ba8a912993ea199cb9