Update pom.xml

Fix logging

Author: AB-xdev

vaadin-addon-template-demo/pom.xml

@@ -73,10 +73,7 @@
 			<artifactId>vaadin-addon-template</artifactId>
 			<version>${project.version}</version>
 		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-simple</artifactId>
-		</dependency>
+
 		<!-- Spring -->
 		<dependency>
 			<groupId>com.vaadin</groupId>