Minor cleanup

src/test/java/com/example/springboot/HelloControllerIT.java

@@ -4,7 +4,6 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.client.TestRestTemplate;
-import org.springframework.http.ResponseEntity;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -13,13 +12,13 @@ public class HelloControllerIT {
     @Autowired
     private TestRestTemplate template;
 
-    public static void main(String[] args) throws Exception {
+    public static void main(String[] args) {
         new HelloControllerIT().getHello();
     }
 
     @Test
-    public void getHello() throws Exception {
-        ResponseEntity<String> response = template.getForEntity("/", String.class);
+    public void getHello() {
+        var response = template.getForEntity("/", String.class);
         assertThat(response.getBody()).isEqualTo("Greetings from Spring Boot!");
     }
 }