Do not automatically load translations from plugins

One shoud use translations import feature instead

src/mibew/libs/common/locale.php

@@ -688,30 +688,6 @@ function load_messages($locale)
 
             $messages[$locale] = $locale_data['messages'];
         } else {
-            // Load active plugins localization
-            $plugins_list = array_keys(PluginManager::getAllPlugins());
-
-            foreach ($plugins_list as $plugin_name) {
-                // Build plugin path
-                list($vendor_name, $plugin_short_name) = explode(':', $plugin_name, 2);
-                $plugin_name_parts = explode('_', $plugin_short_name);
-                $locale_file = MIBEW_FS_ROOT
-                    . "/plugins/" . ucfirst($vendor_name) . "/Mibew/Plugin/"
-                    . implode('', array_map('ucfirst', $plugin_name_parts))
-                    . "/locales/{$locale}/translation.po";
-
-                // Get localized strings
-                if (is_readable($locale_file)) {
-                    $locale_data = read_locale_file($locale_file);
-                    // array_merge used to provide an ability for plugins to override
-                    // localized strings
-                    $messages[$locale] = array_merge(
-                        $messages[$locale],
-                        $locale_data['messages']
-                    );
-                }
-            }
-
             // Load localizations from the database
             $db = Database::getInstance();
             $db_messages = $db->query(