Polish gh-6025 (#6071)

Signed-off-by: Johnny Lim <[email protected]>

Author: izeye

Diff for: implementations/micrometer-registry-otlp/src/main/java/io/micrometer/registry/otlp/OtlpMetricsSender.java

@@ -42,8 +42,6 @@ public interface OtlpMetricsSender {
     /**
      * Immutable representation of a payload of metrics to use with an
      * {@link OtlpMetricsSender}.
-     *
-     * @since 1.15.0
      */
     class Request {