souphttpsink: don't create unused second sink pad object

The base class will create the sink pad.

ext/soup/gstsouphttpsink.c

@@ -200,10 +200,6 @@ gst_soup_http_sink_init (GstSoupHttpSink * souphttpsink,
 {
   const char *proxy;
 
-  souphttpsink->sinkpad =
-      gst_pad_new_from_static_template (&gst_soup_http_sink_sink_template,
-      "sink");
-
   souphttpsink->mutex = g_mutex_new ();
   souphttpsink->cond = g_cond_new ();
 

ext/soup/gstsouphttpsink.h

@@ -38,8 +38,6 @@ struct _GstSoupHttpSink
 {
   GstBaseSink base_souphttpsink;
 
-  GstPad *sinkpad;
-
   GMutex *mutex;
   GCond *cond;
   GMainContext *context;