cmake: Drop libkwin's unused Xlib dependencies

CMakeLists.txt

@@ -630,12 +630,6 @@ set(kwin_KDE_LIBS
     PW::KScreenLocker
 )
 
-set(kwin_XLIB_LIBS
-    ${X11_ICE_LIB}
-    ${X11_SM_LIB}
-    ${X11_X11_LIB}
-)
-
 set(kwin_XCB_LIBS
     XCB::COMPOSITE
     XCB::DAMAGE
@@ -662,7 +656,6 @@ set(kwinLibs
     ${kwin_OWN_LIBS}
     ${kwin_QT_LIBS}
     ${kwin_KDE_LIBS}
-    ${kwin_XLIB_LIBS}
     ${kwin_XCB_LIBS}
     ${kwin_WAYLAND_LIBS}
     UDev::UDev

plugins/platforms/x11/standalone/CMakeLists.txt

@@ -28,7 +28,7 @@ endif()
 
 add_library(KWinX11Platform MODULE ${X11PLATFORM_SOURCES})
 set_target_properties(KWinX11Platform PROPERTIES LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/org.kde.kwin.platforms/")
-target_link_libraries(KWinX11Platform eglx11common kwin kwinxrenderutils SceneOpenGLBackend VsyncSupport Qt5::X11Extras XCB::CURSOR KF5::Crash )
+target_link_libraries(KWinX11Platform eglx11common kwin kwinxrenderutils SceneOpenGLBackend VsyncSupport Qt5::X11Extras XCB::CURSOR KF5::Crash X11::X11)
 if (X11_Xinput_FOUND)
     target_link_libraries(KWinX11Platform ${X11_Xinput_LIB})
 endif()

plugins/platforms/x11/windowed/CMakeLists.txt

@@ -8,7 +8,7 @@ set(X11BACKEND_SOURCES
 
 add_library(KWinWaylandX11Backend MODULE ${X11BACKEND_SOURCES})
 set_target_properties(KWinWaylandX11Backend PROPERTIES LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin/org.kde.kwin.waylandbackends/")
-target_link_libraries(KWinWaylandX11Backend eglx11common kwin kwinxrenderutils X11::XCB SceneQPainterBackend SceneOpenGLBackend VsyncSupport)
+target_link_libraries(KWinWaylandX11Backend eglx11common kwin kwinxrenderutils X11::XCB SceneQPainterBackend SceneOpenGLBackend VsyncSupport X11::X11)
 if (X11_Xinput_FOUND)
     target_link_libraries(KWinWaylandX11Backend ${X11_Xinput_LIB})
 endif()