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The items weren't specified in the Fixtures and Fittings, but two days before completion I did agree to leave curtain poles and all permanent wall fixtures.
I did fill in the holes left by the TV brackets, and the only light fittings that the contract said I must leave were the flex, bulb holder and bulb. I did leave these, and in fact the whole house was spotless. My wife and I spent two days making sure that everything was gleaming clean e.g. oven etc.
We also left the purchasers a "Welcome to your new home" card, wishing them all the very best of happiness in the house and left a bottle of bubbly and two glasses on the fireplace.