Switch to gwt-maven-plugin 2.3.0

pom.xml

@@ -29,7 +29,6 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <gwtVersion>2.3.0</gwtVersion>
     </properties>
 
     <developers>
@@ -68,7 +67,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>gwt-maven-plugin</artifactId>
-                <version>2.2.0</version>
+                <version>2.3.0</version>
                 <executions>
 					<!-- GWT version detected from dependencyManagement -->
                     <execution>
@@ -77,23 +76,6 @@
                         </goals>
                     </execution>
                 </executions>
-                <dependencies>
-                    <dependency>
-                        <groupId>com.google.gwt</groupId>
-                        <artifactId>gwt-user</artifactId>
-                        <version>${gwtVersion}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>com.google.gwt</groupId>
-                        <artifactId>gwt-dev</artifactId>
-                        <version>${gwtVersion}</version>
-                    </dependency>
-                    <dependency>
-                        <groupId>com.google.gwt</groupId>
-                        <artifactId>gwt-servlet</artifactId>
-                        <version>${gwtVersion}</version>
-                    </dependency>
-                </dependencies>
             </plugin>
 
         </plugins>