The charging port is soldered onto the motherboard in four locations.

There are two points on the inward facing side as shown in the first image, and there is one point on either side of the port.

To completely remove the port, use a soldering iron to melt the solder holding on the port and gently disconnect the port form the motherboard.

If soldering is new to you, check out this helpful guide on soldering and desoldering connections.