I suggest u get it off the other one too though. Its a bit sticky but it will come off and u do want photosyntesis to start as soon as possible.

To simplify a bit plants are made up from carbon to a VERY big degree and that comes from the air. (CO2)

You might even go as far as saying that the (almost) sole purpouse of nutes in whatever form you give a plant is to make them more efficiently absorb carbon to make building blocks to grow. You wont hurt a plant by making this process starting as long as u don't physically hurt it and you wont on that one if u are careful, believe me.
Another thing is the longer it takes for it to get light ON the leaves the more it will stretch and exhaust its reserves to push up instead of developing.

Puffzter