remove obsolete native-image flag

Author: birdayz

Dockerfile

@@ -6,7 +6,7 @@ ENV GRADLE_USER_HOME /tmp/build/.gradle
 ADD . /tmp/build
 RUN ./gradlew build fatJar
 RUN native-image -jar /tmp/build/build/libs/graal-javalin-all-1.0-SNAPSHOT.jar -H:ReflectionConfigurationFiles=reflection.json -H:+JNI \
-  -H:Name=graal-javalin --static --delay-class-initialization-to-runtime=io.javalin.json.JavalinJson
+  -H:Name=graal-javalin --static
 
 FROM scratch
 COPY --from=0 /tmp/build/graal-javalin /