Replace screen, but broke a chip of the camera module. What is it for?

I replaced the cracked screen on my N5 and everything went well. The screen works great. Thing is, when I was moving the rear camera to the new frame, one of the chips on the side of the camera module broke off. The camera works fine, but I am not sure what that chip was for. If you look at this picture, it would be the chip on the left side above the lens.

Any ideas?

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