Fix javadoc todo

Author: trask

instrumentation/ktor/ktor-2-common/library/src/main/kotlin/io/opentelemetry/instrumentation/ktor/client/internal/Experimental.kt

@@ -12,11 +12,10 @@ import java.util.logging.Level
 import java.util.logging.Logger
 
 /**
- * This class is internal and is hence not for public use. Its APIs are unstable and can change at
- * any time.
+ * This class is internal and experimental. Its APIs are unstable and can change at any time. Its
+ * APIs (or a version of them) may be promoted to the public stable API in the future, but no
+ * guarantees are made.
  */
-// TODO (trask) update the above javadoc similar to
-//  https://github.com/open-telemetry/opentelemetry-java/pull/6886
 class Experimental {
 
   companion object {