Remove deprecated, the extra field is now optional

Author: cbos

instrumentation-api-incubator/src/main/java/io/opentelemetry/instrumentation/api/incubator/semconv/messaging/MessagingSpanNameExtractor.java

@@ -21,7 +21,6 @@ public final class MessagingSpanNameExtractor<REQUEST> implements SpanNameExtrac
    *     name>}.
    * @see MessageOperation used to extract {@code <operation name>}.
    */
-  @Deprecated
   public static <REQUEST> SpanNameExtractor<REQUEST> create(
       MessagingAttributesGetter<REQUEST, ?> getter, MessageOperation operation) {
     return new MessagingSpanNameExtractor<>(getter, operation, null);