fix(snmp_zabbix): health check for some special devices (flashcatcloud#1373)

Author: kongfei605

inputs/snmp_zabbix/snmp_client.go

@@ -314,17 +314,12 @@ func (m *SNMPClientManager) performHealthCheckNoLock(wrapper *ClientWrapper) err
 	errChan := make(chan error, 1)
 	go func() {
 		// 执行简单的SNMP Get请求 (sysUpTime)
-		result, err := wrapper.client.Get([]string{"1.3.6.1.2.1.1.3.0"})
+		_, err := wrapper.client.Get([]string{"1.3.6.1.2.1.1.3.0"})
 		if err != nil {
 			errChan <- fmt.Errorf("health check SNMP get failed: %w", err)
 			return
 		}
 
-		if len(result.Variables) == 0 {
-			errChan <- fmt.Errorf("health check returned no data")
-			return
-		}
-
 		errChan <- nil
 	}()
 
@@ -695,4 +690,4 @@ type ClientHealthDetail struct {
 	RetryCount   int
 	ErrorCount   uint64
 	SuccessCount uint64
-}
+}