fix checkstyle

Signed-off-by: Abhishek Kumar <abhishek.mrt22@gmail.com>

Author: shwstppr

server/src/main/java/com/cloud/capacity/CapacityManagerImpl.java

@@ -56,7 +56,6 @@
 import com.cloud.configuration.Config;
 import com.cloud.dc.ClusterDetailsDao;
 import com.cloud.dc.ClusterDetailsVO;
-import com.cloud.dc.DataCenterVO;
 import com.cloud.dc.dao.ClusterDao;
 import com.cloud.deploy.DeploymentClusterPlanner;
 import com.cloud.event.UsageEventVO;