refactor: drop unused xtend-gen scaffolding - com.avaloq.tools.ddk.checkcfg.ide

The bundle has no Xtend sources; the xtend-gen entries in .classpath and
build.properties and the empty xtend-gen directory are leftovers.

Author: joaodinissf

com.avaloq.tools.ddk.checkcfg.ide/.classpath

@@ -6,11 +6,6 @@
       <attribute name="ignore_optional_problems" value="true"/>
     </attributes>
   </classpathentry>
-  <classpathentry kind="src" path="xtend-gen">
-    <attributes>
-      <attribute name="ignore_optional_problems" value="true"/>
-    </attributes>
-  </classpathentry>
   <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
   <classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins">
     <accessrules>

com.avaloq.tools.ddk.checkcfg.ide/build.properties

@@ -1,5 +1,4 @@
 source.. = src/,\
-           src-gen/,\
-           xtend-gen/
+           src-gen/
 bin.includes = META-INF/,\
                .