Remove log4jConfigLocation from sample web.xml files

This prevents errors looking for the LogManager which is no longer
on the classpath since we use sl4j.

samples/cas/sample/src/main/webapp/WEB-INF/web.xml

@@ -21,11 +21,6 @@
         </param-value>
     </context-param>
 
-    <context-param>
-        <param-name>log4jConfigLocation</param-name>
-        <param-value>/WEB-INF/classes/log4j.properties</param-value>
-    </context-param>
-
     <context-param>
         <param-name>webAppRootKey</param-name>
         <param-value>cas.root</param-value>

samples/contacts/src/main/webapp/WEB-INF/web.xml

@@ -26,11 +26,6 @@
 
    <!-- Nothing below here needs to be modified -->
 
-    <context-param>
-        <param-name>log4jConfigLocation</param-name>
-        <param-value>/WEB-INF/classes/log4j.properties</param-value>
-    </context-param>
-
     <context-param>
         <param-name>webAppRootKey</param-name>
         <param-value>contacts.root</param-value>

samples/openid/src/main/webapp/WEB-INF/web.xml

@@ -21,11 +21,6 @@
         </param-value>
     </context-param>
 
-    <context-param>
-        <param-name>log4jConfigLocation</param-name>
-        <param-value>/WEB-INF/classes/log4j.properties</param-value>
-    </context-param>
-
     <context-param>
         <param-name>webAppRootKey</param-name>
         <param-value>openid.root</param-value>

samples/tutorial/src/main/webapp/WEB-INF/web.xml

@@ -22,11 +22,6 @@
         </param-value>
     </context-param>
 
-    <context-param>
-        <param-name>log4jConfigLocation</param-name>
-        <param-value>/WEB-INF/classes/log4j.properties</param-value>
-    </context-param>
-
     <context-param>
         <param-name>webAppRootKey</param-name>
         <param-value>tutorial.root</param-value>