Remove arguments and level by default

Author: ecerulm

logback-classic/src/main/java/ch/qos/logback/classic/encoder/StructuredLoggingJsonEncoder.java

@@ -46,6 +46,13 @@ public class StructuredLoggingJsonEncoder extends JsonEncoder {
     protected boolean withTimestampSeconds = false;
     protected boolean withTimestampNanos = false;
     protected boolean withTime = false;
+    protected boolean withSeverity = true;
+
+    public StructuredLoggingJsonEncoder() {
+        super();
+        withArguments = false;
+        withLevel = false;
+    }
 
     @Override
     protected void appenderTimestamp(StringBuilder sb, ILoggingEvent event) {

logback-classic/src/test/java/ch/qos/logback/classic/encoder/StructuredLoggingJsonEncoderTest.java

@@ -112,6 +112,8 @@ void smoke() throws JsonProcessingException {
         assertNull(json.get("timestampSeconds"));
         assertNull(json.get("timestampNanos"));
         assertNull(json.get("time"));
+        assertNull(json.get("arguments"));
+        assertNull(json.get("level"));