Remove a redundant code line

Author: tzolov

models/spring-ai-anthropic/src/main/java/org/springframework/ai/anthropic/AnthropicChatModel.java

@@ -195,7 +195,6 @@ private ChatResponse toChatResponse(ChatCompletionResponse chatCompletion) {
 			.stream()
 			.filter(content -> content.type() != ContentBlock.Type.TOOL_USE)
 			.map(content -> {
-				new AssistantMessage(content.text(), Map.of());
 				return new Generation(new AssistantMessage(content.text(), Map.of()),
 						ChatGenerationMetadata.from(chatCompletion.stopReason(), null));
 			})