I remove the ground inside the power cord at the IEC connector (the end that plugs into the equipment). I leave the ground connected to the wall socket and that end of the power cord as well.
The ground wire inside the AC cord benefits from having a drain wire path for noise and RF. Best of all, the ground can be reattached when it comes time to sell.
I use a tiny piece of shrink wrap on the disconnected ground wire, keeping it insulated from other connectors and wires.
Cables that have molded IEC connectors or have large shrink covering the connector make this method difficult. Performance wise this is the ultimate method as the ground pin is retained, which helps secure the connection to the wall, even though it's passive at this point.