If you have completely disassembled the gun you will see that one of the internal sides that holds the sear is in turn the ejector .
They remove the pin , remove the block from the frame and the ejector comes ejector .
It is convenient when retouching it, as in all ejector , that it does not file laterally.
An ejector should only be touched up when proper ejection from the case has not been achieved by other means. In this case, it should only be filed from the front (by cutting it), or by giving that front an angle, but never from the side.
