Debug leak (#695)

src/main/kotlin/io/emeraldpay/dshackle/Starter.kt

@@ -17,7 +17,6 @@
 package io.emeraldpay.dshackle
 
 import io.netty.handler.ssl.OpenSsl
-import io.netty.util.ResourceLeakDetector
 import org.slf4j.LoggerFactory
 import org.springframework.boot.ResourceBanner
 import org.springframework.boot.SpringApplication
@@ -38,10 +37,6 @@ fun main(args: Array<String>) {
 
     HeapDumpCreator.init()
 
-    System.setProperty("io.netty.leakDetection.targetRecords", "10");
-
-    ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.ADVANCED)
-
     val cores = Runtime.getRuntime().availableProcessors()
     val maxMemory: Long = Runtime.getRuntime().maxMemory() / (1024 * 1024).toLong()
     log.info("Max heap size: {} MB, number of cores: {}", maxMemory, cores)