Remove unused import

Author: devoxin

LavalinkServer/src/main/java/lavalink/server/player/AudioLoaderRestHandler.java

@@ -31,7 +31,6 @@
 import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;