Address review comments

Author: steverao

instrumentation/async-http-client/async-http-client-1-common/javaagent/build.gradle.kts

@@ -3,7 +3,7 @@ plugins {
 }
 
 dependencies {
-  compileOnly("com.ning:async-http-client:1.8.3")
+  compileOnly("com.ning:async-http-client:1.8.0")
 
   compileOnly("com.google.auto.value:auto-value-annotations")
   annotationProcessor("com.google.auto.value:auto-value")

instrumentation/async-http-client/async-http-client-1.8/javaagent/build.gradle.kts

@@ -14,7 +14,7 @@ muzzle {
 dependencies {
   implementation(project(":instrumentation:async-http-client:async-http-client-1-common:javaagent"))
 
-  library("com.ning:async-http-client:1.8.3")
+  library("com.ning:async-http-client:1.8.0")
 
   compileOnly("com.google.auto.value:auto-value-annotations")
   annotationProcessor("com.google.auto.value:auto-value")

instrumentation/async-http-client/async-http-client-1.8/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/asynchttpclient/v1_8/AsyncHttpClientSingletons.java

@@ -13,13 +13,9 @@
 public final class AsyncHttpClientSingletons {
   private static final String INSTRUMENTATION_NAME = "io.opentelemetry.async-http-client-1.8";
 
-  private static final Instrumenter<Request, Response> INSTRUMENTER;
-
-  static {
-    INSTRUMENTER =
-        AsyncHttpClientInstrumenterFactory.create(
-            INSTRUMENTATION_NAME, AsyncHttpClient18Helper.INSTANCE);
-  }
+  private static final Instrumenter<Request, Response> INSTRUMENTER =
+      AsyncHttpClientInstrumenterFactory.create(
+          INSTRUMENTATION_NAME, AsyncHttpClient18Helper.INSTANCE);
 
   public static Instrumenter<Request, Response> instrumenter() {
     return INSTRUMENTER;

instrumentation/async-http-client/async-http-client-1.9/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/asynchttpclient/v1_9/AsyncHttpClientSingletons.java

@@ -13,13 +13,9 @@
 public final class AsyncHttpClientSingletons {
   private static final String INSTRUMENTATION_NAME = "io.opentelemetry.async-http-client-1.9";
 
-  private static final Instrumenter<Request, Response> INSTRUMENTER;
-
-  static {
-    INSTRUMENTER =
-        AsyncHttpClientInstrumenterFactory.create(
-            INSTRUMENTATION_NAME, AsyncHttpClient19Helper.INSTANCE);
-  }
+  private static final Instrumenter<Request, Response> INSTRUMENTER =
+      AsyncHttpClientInstrumenterFactory.create(
+          INSTRUMENTATION_NAME, AsyncHttpClient19Helper.INSTANCE);
 
   public static Instrumenter<Request, Response> instrumenter() {
     return INSTRUMENTER;