[SCB-2614] remove debug code (main method) of ArgWrapperJavaType (#3144)

diff --git a/swagger/swagger-invocation/invocation-core/src/main/java/org/apache/servicecomb/swagger/invocation/arguments/producer/codec/ArgWrapperJavaType.java b/swagger/swagger-invocation/invocation-core/src/main/java/org/apache/servicecomb/swagger/invocation/arguments/producer/codec/ArgWrapperJavaType.java
index d61353d..26453fd 100644
--- a/swagger/swagger-invocation/invocation-core/src/main/java/org/apache/servicecomb/swagger/invocation/arguments/producer/codec/ArgWrapperJavaType.java
+++ b/swagger/swagger-invocation/invocation-core/src/main/java/org/apache/servicecomb/swagger/invocation/arguments/producer/codec/ArgWrapperJavaType.java
@@ -18,7 +18,6 @@
 
 import java.io.IOException;
 import java.lang.reflect.Type;
-import java.util.Date;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
@@ -32,8 +31,6 @@
 import com.fasterxml.jackson.databind.type.SimpleType;
 import com.fasterxml.jackson.databind.type.TypeFactory;
 
-import io.swagger.util.Json;
-
 public class ArgWrapperJavaType extends SimpleType {
   private static final long serialVersionUID = 964882360361204479L;
 
@@ -80,19 +77,4 @@
 
     return args;
   }
-
-  public static void main(String[] _args) throws IOException {
-    Map<String, Object> map = new HashMap<>();
-    map.put("date", new Date());
-    map.put("num", 1L);
-
-    ArgWrapperJavaType argWrapperJavaType = new ArgWrapperJavaType();
-    argWrapperJavaType.addProperty("date", Date.class);
-    argWrapperJavaType.addProperty("num", Long.class);
-
-    String json = Json.pretty(map);
-
-    Map<String, Object> args = argWrapperJavaType.readValue(Json.mapper(), json);
-    System.out.println(args);
-  }
 }