rm explicit exclusion of websocketautoconfiguration

the issue with `MockMvc` picking up an uninitialized websocket
upgradefilter has been fixed in
spring-projects/spring-boot@6353603

src/main/java/tla/web/App.java

@@ -2,27 +2,20 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration;
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.SpringProperties;
 
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
-// exclusion only necessary until spring boot 3.2.0-M4
-// (cf. https://github.com/spring-projects/spring-boot/issues/37660) ⬇:
-@SpringBootApplication(exclude = WebSocketServletAutoConfiguration.class)
+@SpringBootApplication
 public class App {
 
     public static void main(String[] args) {
         SpringProperties.setFlag("spring.xml.ignore");
-        ApplicationContext context = SpringApplication.run(
-            App.class,
-            args
-        );
+        ApplicationContext context = SpringApplication.run(App.class, args);
         log.info(
-            "bean definitions: {}",
-            context.getBeanDefinitionNames().length
+            "bean definitions: {}", context.getBeanDefinitionNames().length
         );
     }