revert OcpResponseData constructors

Author: JackShi148

src/main/java/com/alipay/oceanbase/rpc/location/model/OcpResponseDataIDC.java

@@ -25,7 +25,6 @@
 public class OcpResponseDataIDC {
     private String idc;
     private String region;
-    public OcpResponseDataIDC() {}
 
     /*
      * Get idc.

src/main/java/com/alipay/oceanbase/rpc/location/model/OcpResponseDataRs.java

@@ -23,7 +23,6 @@ public class OcpResponseDataRs {
     private String address;
     private String role;
     private int    sql_port;
-    public OcpResponseDataRs() {}
 
     /*
      * Get address.