DOC: remove outdated instruction; update code snippet

src/doc/extension/module.md

@@ -23,16 +23,16 @@ Create a new file in `src/core/js` starting with `ext_`. E.g. `ext_flight_previe
  * @requires somelibrary
  * (pass the dependencies as arguments)
  */
-var ext_flight_preview = function (somelibrary) {
+const ext_flight_preview = function (libA, libB) {
 
-    var init = function (toolbox) {
+    const init = function () {
         /* initialization of the module */
     }
 
     /**
      * doc string
      */
-    var some_function = function (arg1, arg2) {
+    const some_function = function (arg1, arg2) {
     }
 
     /* the main function must return the initialization of the module */
@@ -40,7 +40,7 @@ var ext_flight_preview = function (somelibrary) {
         init: init,
     };
 //pass the dependencies as arguments here as well
-}(somelibrary);
+}(libA, libB);
 
 // this will be replaced by require.js in the future.
 $(document).ready(function() {
@@ -52,16 +52,6 @@ $(document).ready(function() {
     }
 });
 ```
-## Update xml
-Add a section to `src/core/xsl/main.xsl` to include your new file.
-
-```xsl
-<xsl:element name="script">       
-   <xsl:attribute name="src">         
-     <xsl:value-of select="concat($basepath,'webinterface/${BUILD_NUMBER}/js/ext_sss_markdown.js')"/>             
-   </xsl:attribute>     
-</xsl:element>
-```
 
 ## Add to index.html in test
 If you have unittests (and you should), you need to add a line in :
@@ -69,4 +59,4 @@ If you have unittests (and you should), you need to add a line in :
 
 ## Update the changelog
 
-## Create a merge request
\ No newline at end of file
+## Create a merge request