Remove obsolete X11/XCB check
AFAIU it originated from plasma-framework, but it is not needed or used for ksvg. In any case there are no find_package calls for X11 or XCB and the HAVE_ variables are never set.
AFAIU it originated from plasma-framework, but it is not needed or used for ksvg. In any case there are no find_package calls for X11 or XCB and the HAVE_ variables are never set.