Remove some dead code

app/src/main/java/eu/kanade/tachiyomi/source/online/HttpSource.kt

@@ -30,13 +30,6 @@ abstract class HttpSource : CatalogueSource {
      */
     protected val network: NetworkHelper by injectLazy()
 
-//    /**
-//     * Preferences that a source may need.
-//     */
-//    val preferences: SharedPreferences by lazy {
-//        Injekt.get<Application>().getSharedPreferences(source.getPreferenceKey(), Context.MODE_PRIVATE)
-//    }
-
     /**
      * Base url of the website without the trailing slash, like: http://mysite.com
      */