Remove another unused import

Author: winterhazel

plugins/metrics/src/main/java/org/apache/cloudstack/metrics/MetricsServiceImpl.java

@@ -82,7 +82,6 @@
 import org.apache.cloudstack.utils.bytescale.ByteScaleUtils;
 import org.apache.commons.beanutils.BeanUtils;
 import org.apache.commons.collections.CollectionUtils;
-import org.apache.commons.lang3.ObjectUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
 import org.apache.commons.lang3.builder.ToStringStyle;