Issue #2248009 by twistor | djdevin: Fixed Remove the population of...

Issue #2248009 by twistor | djdevin: Fixed Remove the population of ->source_config from FeedsPlugin.

plugins/FeedsPlugin.inc

@@ -19,16 +19,6 @@ class FeedsResult {}
  */
 abstract class FeedsPlugin extends FeedsConfigurable implements FeedsSourceInterface {
 
-  /**
-   * Constructor.
-   *
-   * Initialize class variables.
-   */
-  protected function __construct($id) {
-    parent::__construct($id);
-    $this->source_config = $this->sourceDefaults();
-  }
-
   /**
    * Returns the type of plugin.
    *