Refactor the stream applications

Thanks to Soby Chacko for the suggestions

spring-cloud-stream-function-bindings/time-source/src/main/java/com/example/timesource/TimeSourceApplication.java

@@ -7,26 +7,20 @@ import java.util.function.Supplier;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
 
 @SpringBootApplication
 public class TimeSourceApplication {
 
+	@Bean
+	public Supplier<String> timeSupplier() {
+		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
+		return () -> {
+			return sdf.format(new Date());
+		};
+	}
+
 	public static void main(String[] args) {
 		SpringApplication.run(TimeSourceApplication.class, args);
 	}
 
-	@Configuration
-	public class TimeSupplierConfiguration {
-		public TimeSupplierConfiguration() {
-		}
-
-		@Bean
-		public Supplier<String> timeSupplier() {
-			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
-			return () -> {
-				return sdf.format(new Date());
-			};
-		}
-	}
 }