test: Remove debug System.out.println from QuestionAnswerAdvisorTests

Signed-off-by: Theo <[email protected]>
Signed-off-by: seongm1n <[email protected]>

Fixes #4102

(cherry picked from commit c72c8c2)

Author: seongm1n

advisors/spring-ai-advisors-vector-store/src/test/java/org/springframework/ai/chat/client/advisor/vectorstore/QuestionAnswerAdvisorTests.java

@@ -151,8 +151,6 @@ public Duration getTokensReset() {
 
 		Message systemMessage = this.promptCaptor.getValue().getInstructions().get(0);
 
-		System.out.println(systemMessage.getText());
-
 		assertThat(systemMessage.getText()).isEqualToIgnoringWhitespace("""
 				Default system text.
 				""");