remove unused code

cat-home/src/main/java/com/dianping/cat/report/task/metric/AlertInfo.java

@@ -21,7 +21,7 @@ public class AlertInfo implements Initializable {
 	protected MetricConfigManager m_manager;
 
 	public void addAlertInfo(MetricItemConfig config, long value) {
-		m_alertInfos.putIfAbsent(config, value);
+		m_alertInfos.put(config, value);
 	}
 
 	public List<MetricItemConfig> queryLastestAlarmInfo(int minute) {

cat-home/src/main/java/com/dianping/cat/report/task/metric/MetricAlert.java

@@ -181,9 +181,8 @@ public class MetricAlert extends BaseAlert implements Task, LogEnabled {
 		}
 
 		if (alert != null && alert.getKey()) {
-			config.setId(m_metricConfigManager.buildMetricKey(config.getDomain(), config.getType(), config.getMetricKey()));
-
 			m_alertInfo.addAlertInfo(config, new Date().getTime());
+			
 			sendAlertInfo(productLine, config, alert.getValue());
 		}
 	}

cat-home/src/main/java/com/dianping/cat/report/task/metric/SwitchAlert.java

@@ -123,7 +123,6 @@ public class SwitchAlert extends BaseAlert implements Task, LogEnabled {
 		}
 
 		if (alert != null && alert.getKey()) {
-			config.setId(m_metricConfigManager.buildMetricKey(config.getDomain(), config.getType(), config.getMetricKey()));
 			m_alertInfo.addAlertInfo(config, new Date().getTime());
 			sendAlertInfo(productLine, config, alert.getValue());
 		}

cat-home/src/main/java/com/dianping/cat/system/page/config/Handler.java

@@ -416,6 +416,7 @@ public class Handler implements PageHandler<Context> {
 
 		if (!StringUtil.isEmpty(domain) && !StringUtil.isEmpty(type) && !StringUtil.isEmpty(metricKey)) {
 			config.setId(m_metricConfigManager.buildMetricKey(domain, type, metricKey));
+			
 			return m_metricConfigManager.insertMetricItemConfig(config);
 		} else {
 			return false;