kwineffects: Stop linking kwayland-server

As is, libkwineffects doesn't use any specific apis in kwayland-server,
it simply "forwards" wayland display and surfaces from libkwin. Given
that, there is no need to link libkwineffects with kwayland-server. If
an effect needs to access wayland specific stuff, it can link explicitly
against kwayland-server.

The main motivation behind this change is to further loosen up
dependencies between various kwin components and kwayland-server so the
latter can be moved back to kwin.

src/effects/CMakeLists.txt

@@ -20,6 +20,7 @@ set(kwin_effect_KDE_LIBS
     KF5::Plasma # screenedge effect
     KF5::WindowSystem
     KF5::Service # utils / screenshot effect
+    Plasma::KWaylandServer
 )
 
 if (HAVE_ACCESSIBILITY)

src/libkwineffects/CMakeLists.txt

@@ -52,7 +52,6 @@ target_link_libraries(kwineffects
         KF5::CoreAddons
         KF5::WindowSystem
         XCB::XCB
-        Plasma::KWaylandServer
     PRIVATE
         Qt::Quick
         KF5::Declarative