Do not delete node_modules in clean phase

It is not possible to safely clean the node_modules folder because the
maven-clean-plugin cannot handle symlinks correctly and deletes all
linked files instead of the symlink only. <followSymlinks> seems not to
work correctly. Therefore do not remove the node_modules folder and rely
on pnpm to update the folder correctly. This also improves build
performance because the node_modules folder might be reused.
diff --git a/maven_plugin_config-master/pom.xml b/maven_plugin_config-master/pom.xml
index f3d3f87..8aa23cf 100644
--- a/maven_plugin_config-master/pom.xml
+++ b/maven_plugin_config-master/pom.xml
@@ -623,13 +623,6 @@
               </includes>
               <followSymlinks>false</followSymlinks>
             </fileset>
-            <fileset>
-              <directory>${basedir}</directory>
-              <includes>
-                <include>node_modules/**</include>
-              </includes>
-              <followSymlinks>false</followSymlinks>
-            </fileset>
           </filesets>
         </configuration>
       </plugin>