- Clean up search engine plugins code

- Update plugins from sourceforge SVN/trunk now to avoid maintenance of another update server

src/misc.h

@@ -269,29 +269,6 @@ public:
     list.insert(i, value);
   }
 
-  static float getPluginVersion(QString filePath) {
-    QFile plugin(filePath);
-    if(!plugin.exists()){
-      qDebug("%s plugin does not exist, returning 0.0", filePath.toLocal8Bit().data());
-      return 0.0;
-    }
-    if(!plugin.open(QIODevice::ReadOnly | QIODevice::Text)){
-      return 0.0;
-    }
-    float version = 0.0;
-    while (!plugin.atEnd()){
-      QByteArray line = plugin.readLine();
-      if(line.startsWith("#VERSION: ")){
-        line = line.split(' ').last();
-        line.replace("\n", "");
-        version = line.toFloat();
-        qDebug("plugin %s version: %.2f", filePath.toLocal8Bit().data(), version);
-        break;
-      }
-    }
-    return version;
-  }
-
   static QString magnetUriToHash(QString magnet_uri) {
     QString hash = "";
     QRegExp reg("urn:btih:([A-Z2-7=]+)");