remove readonly attribute

src/Form/ModuleConfigurationForm.php

@@ -58,11 +58,10 @@ class ModuleConfigurationForm extends ConfigFormBase {
     $form['basic']['site_name'] = array(
       '#type' => 'textfield',
       '#title' => $this->t('Site Name'),
-      '#description' => $this->t('READ ONLY for now until this app is done. Main name for the site - it should be your college, department or organization name.'),
+      '#description' => $this->t('Main name for the site - it should be your college, department or organization name.'),
       '#size' => '60',
       '#maxlength' => '75',
       '#default_value' => $site_name,
-      '#attributes' => array('readonly' => 'readonly'),
     );
     
     $form['basic']['admin_link'] = array(