diff --git a/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/ChannelFutureListenerInstrumentation.java b/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/ChannelFutureListenerInstrumentation.java
index fb276841b2..ac378a51bb 100644
--- a/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/ChannelFutureListenerInstrumentation.java
+++ b/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/ChannelFutureListenerInstrumentation.java
@@ -41,12 +41,8 @@ public class ChannelFutureListenerInstrumentation extends Instrumenter.Default {
   @Override
   public String[] helperClassNames() {
     return new String[] {
-      "datadog.trace.agent.tooling.ClassLoaderScopedWeakMap$Supplier",
-      "datadog.trace.agent.tooling.ClassLoaderScopedWeakMap",
       packageName + ".AttributeKeys",
       packageName + ".AttributeKeys$1",
-      packageName + ".AttributeKeys$2",
-      packageName + ".AttributeKeys$3",
       "datadog.trace.agent.decorator.BaseDecorator",
       // client helpers
       "datadog.trace.agent.decorator.ClientDecorator",
diff --git a/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/NettyChannelPipelineInstrumentation.java b/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/NettyChannelPipelineInstrumentation.java
index a8598b0fb4..f45c993a62 100644
--- a/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/NettyChannelPipelineInstrumentation.java
+++ b/dd-java-agent/instrumentation/netty-4.0/src/main/java/datadog/trace/instrumentation/netty40/NettyChannelPipelineInstrumentation.java
@@ -55,12 +55,8 @@ public class NettyChannelPipelineInstrumentation extends Instrumenter.Default {
   @Override
   public String[] helperClassNames() {
     return new String[] {
-      "datadog.trace.agent.tooling.ClassLoaderScopedWeakMap$Supplier",
-      "datadog.trace.agent.tooling.ClassLoaderScopedWeakMap",
       packageName + ".AttributeKeys",
       packageName + ".AttributeKeys$1",
-      packageName + ".AttributeKeys$2",
-      packageName + ".AttributeKeys$3",
       "datadog.trace.agent.decorator.BaseDecorator",
       // client helpers
       "datadog.trace.agent.decorator.ClientDecorator",