Don't use the "Program" parameter and value, use "Rule" name in the delete statement.
You can run netsh advfirewall firewall show rule status=enabled name=all or perhaps netsh advfirewall firewall show rule status=enabled name=all | FIND /I "uTorrent" to get a list of the rules that are enabled to help location the actual name of the rule.
Once this is determined, you can run netsh advfirewall firewall delete rule name="<Rule Name>" and plug the name of the rule in accordingly for it to remove that rule.
Examples
Create a rule with the name "IP Block"
netsh advfirewall firewall add rule name="IP Block" dir=in interface=any action=block remoteip=<IPaddress>/32
Delete a rule with the name "IP Block"
netsh advfirewall firewall delete rule name="IP Block"
Further Resources