To remove a meter from a drawing, go to
Ribbon: DM Electrical->One-Line Diagram-> 
Remove Meter
Pulldown Menu: DM Electrical->One-Line Diagram->Remove Meter
You will be prompted to select the feeder or bus to which the meter is connected.
Select feeder or bus to remove meter from:
After you select the feeder or bus, the connected meter will be removed from the drawing.