Android: No longer keep an active input stream longer than needed.

include/SFML/Graphics/Image.hpp

@@ -265,9 +265,6 @@ private:
     ////////////////////////////////////////////////////////////
     Vector2u           m_size;   ///< Image size
     std::vector<Uint8> m_pixels; ///< Pixels of the image
-    #ifdef SFML_SYSTEM_ANDROID
-    void*              m_stream; ///< Asset file streamer (if loaded from file)
-    #endif
 };
 
 } // namespace sf