Remove redundant throws Exception

See gh-15647

README.adoc

@@ -46,7 +46,7 @@ Here is a quick teaser of a complete Spring Boot application in Java:
 			return "Hello World!";
 		}
 
-		public static void main(String[] args) throws Exception {
+		public static void main(String[] args) {
 			SpringApplication.run(Example.class, args);
 		}