How to unlink / remove an object from a scene? There is an object shared between Blender scenes. So the same object appears more than one scenes (see below).
Is there a way to unlink the object from a specific scene? In my case I would like to remove the Cube.001 from Scene.001.   

 

There is Make Links - Object To Scene command and we can use it to add objects to another scene (see below). So I search for kind of an opposite action.
While the active scene is Scene.001 select Cube.001 and press X. You can also right-click   on the object in the outliner and choose Delete.

Deleting an object only applies to the current scene, any other "copies" in other scenes will still remain there.

You can link the object back to Scene.001 by selecting it in Scene and pressing &#9096; CtrlL->Objects to Scene->Scene.001

You can also remove the object using python, you can type the following into blender's python console or paste it into blender's text editor and click run script. Changing unlink to link will let you replace the object back into Scene.001.

bpy.data.scenes['Scene.001'].objects.unlink(bpy.data.objects['Cube.001'])