Remove redundant javadoc

Author: MatKuhr

foundation-models/openai/src/main/java/com/sap/ai/sdk/foundationmodels/openai/model/OpenAiChatCompletionOutput.java

@@ -47,11 +47,6 @@ public String getContent() throws OpenAiClientException {
     return Objects.requireNonNullElse(getChoices().get(0).getMessage().getContent(), "");
   }
 
-  /**
-   * Add a streamed delta to the total output.
-   *
-   * @param delta the delta to add.
-   */
   @Override
   public void addDelta(@Nonnull final OpenAiChatCompletionDelta delta) {
     super.addDelta(delta);