Fix config handling in (un-)install hooks

i18n_taxonomy/i18n_taxonomy.install

@@ -15,12 +15,12 @@ function i18n_taxonomy_install() {
   // Add two lines of i18n settings to taxonomy config.
   $names = config_get_names_with_prefix('taxonomy.vocabulary');
   foreach ($names as $name) {
-    $config = config("taxonomy.vocabulary.{$name}");
+    $config = config($name);
     $data = $config->get();
     if (isset($data['language']) && $data['language'] == TAXONOMY_LANGUAGE_ENABLED) {
       // But only if multilingual support is enabled.
-      $data['i18n_mode'] = I18N_MODE_NONE;
-      $data['langcode'] = LANGUAGE_NONE;
+      $config->set('i18n_mode', I18N_MODE_NONE);
+      $config->set('langcode', LANGUAGE_NONE);
       $config->save();
     }
   }
@@ -36,9 +36,8 @@ function i18n_taxonomy_uninstall() {
   $names = config_get_names_with_prefix('taxonomy.vocabulary');
   foreach ($names as $name) {
     $config = config($name);
-    $data = $config->get();
-    unset($data['i18n_mode']);
-    unset($data['langcode']);
+    $config->clear('i18n_mode');
+    $config->clear('langcode');
     $config->save();
   }
 }