The question is why? But wait, actually I don’t want to know. If it is within your own project then you can customize the original build system to your heart’s content But I have a feeling you are not using it as intended and I guess you have used Urho3D project as the “carrier” for your own project source code. Anyway, these two symlinks are installed when Urho3DPlayer is built and currently there is no way to tell the build system not to build Urho3DPlayer target, unless you modify the Source/Tools/CMakeLists.txt directly to comment it out. Forgive me if my guess is wrong.
BTW, since Urho is an open source project, next time you can just search for it yourself to answer your last question. Finders, keepers.