[kcminit] Remove unused xcb dependency

startkde/kcminit/CMakeLists.txt

-find_package(XCB OPTIONAL_COMPONENTS XCB)
-set_package_properties(XCB PROPERTIES DESCRIPTION "Xcb libraries"
-                       URL "https://www.x.org"
-                       TYPE OPTIONAL
-                       PURPOSE "Required for enabling special X11 multihead mode")
-configure_file(config-xcb.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/config-xcb.h)
-
 ########### next target ###############
 
 set(kcminit_KDEINIT_SRCS main.cpp)
@@ -15,9 +8,6 @@ qt5_add_dbus_interface(kcminit_KDEINIT_SRCS ${klauncher_xml} klauncher_iface)
 kf5_add_kdeinit_executable( kcminit ${kcminit_KDEINIT_SRCS})
 
 target_link_libraries(kdeinit_kcminit Qt::Core Qt::Gui Qt::DBus KF5::CoreAddons KF5::Service KF5::I18n PW::KWorkspace)
-if (XCB_XCB_FOUND)
-    target_link_libraries(kdeinit_kcminit XCB::XCB)
-endif()
 
 install(TARGETS kdeinit_kcminit ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
 install(TARGETS kcminit         ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
@@ -28,7 +18,6 @@ install(TARGETS kcminit         ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
 
 set(kcminit_startup_KDEINIT_SRCS main.cpp)
 
-
 qt5_add_dbus_interface(kcminit_startup_KDEINIT_SRCS ${klauncher_xml} klauncher_iface)
 kf5_add_kdeinit_executable( kcminit_startup ${kcminit_startup_KDEINIT_SRCS})
 
@@ -36,9 +25,6 @@ ecm_install_configured_files(INPUT plasma-kcminit-phase1.service.in  plasma-kcmi
                                                    DESTINATION ${SYSTEMD_USER_UNIT_INSTALL_DIR})
 
 target_link_libraries(kdeinit_kcminit_startup Qt::Core Qt::Gui Qt::DBus KF5::CoreAddons KF5::Service KF5::I18n PW::KWorkspace)
-if (XCB_XCB_FOUND)
-    target_link_libraries(kdeinit_kcminit_startup XCB::XCB)
-endif()
 
 install(TARGETS kdeinit_kcminit_startup ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
 install(TARGETS kcminit_startup         ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )

startkde/kcminit/config-xcb.h.cmake

-/* Define if you have XCB at all */
-#cmakedefine XCB_FOUND

startkde/kcminit/main.cpp

@@ -18,15 +18,10 @@
 */
 
 #include <config-workspace.h>
-#include <config-xcb.h>
 
 #include "klauncher_iface.h"
 #include "main.h"
 
-#ifdef XCB_FOUND
-#include <xcb/xcb.h>
-#endif
-
 #include <unistd.h>
 
 #include <QDBusConnection>