That is one of the two required 2.4 antennas on the flight receiver. Do not block them, trim them, tape them down,or otherwise modify them unless upgrading to a dipole antenna. The type and placement of these antennas is how they are used in the H standard version.
FYI, this type of arrangement has been common for RC receivers since the 2.4 frequency was incorporated. For best performance 2.4 antennas should be positioned 90* to each other. As pictured they are just fine but they could be bent outwards a little more for better 90* alignment. The exposed wire ends are the active antenna part.
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