refactor：delete useless code

Change-Id: I1c1b28366523e7c7a57665d0c312dc40480b9ef7

Author: pepeshore

instrumentation/jfinal-3.6/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/jfinal/v3_6/ActionMappingInstrumentation.java

@@ -36,7 +36,7 @@ public void transform(TypeTransformer transformer) {
   public static class GetActionAdvice {
 
     @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
-    public static void exitGetAction(@Advice.Return(readOnly = false) Action action) {
+    public static void exitGetAction(@Advice.Return Action action) {
       JFinalSingletons.updateSpan(action);
     }
   }

instrumentation/jfinal-3.6/javaagent/src/test/java/io/opentelemetry/javaagent/instrumentation/jfinal/TestConfig.java

@@ -14,13 +14,11 @@
 import com.jfinal.template.Engine;
 
 public class TestConfig extends JFinalConfig {
-  // 配置常量值
   @Override
   public void configConstant(Constants me) {
     me.setDevMode(true);
   }
 
-  // 配置路由
   @Override
   public void configRoute(Routes me) {
     me.add("/", TestController.class);