Remove obsolete namespace declaration

Signed-off-by: Oliver Kopp <kopp.dev@gmail.com>

org.eclipse.winery.repository/src/main/webapp/WEB-INF/web.xml

@@ -12,7 +12,7 @@
  *    Oliver Kopp - initial API and implementation and bug fixes
  *******************************************************************************/
 -->
-<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="winery" version="3.0">
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="winery" version="3.0">
 	<display-name>Winery Repository</display-name>
 
 	<filter>