In this case it may be best to remove the A/C pump and install a bypass pulley in its place. On many motors a smaller belt can be used instead of needing a pulley. More horsepower and better mpg will be accomplished.
If you have an electric cluth, you can just disconnect the control wires. If not, then remove the fan belt first and then remove the clutch. Or you could remove the A/C pump and replace with a smaller belt.