Revert "Accept self-signed certificate in https:// stream"

This reverts commit 6c8d1b2.
The fix only applies when neonhttpsrc is being used, which only
happens if gstreamer-bad-plugins is available without
gstreamer-good-plugins.

src/engines/gstenginepipeline.cpp

@@ -734,12 +734,6 @@ void GstEnginePipeline::SourceSetupCallback(GstURIDecodeBin* bin, GParamSpec *ps
     g_object_set(element, "extra-headers", headers, NULL);
     gst_structure_free(headers);
   }
-  if (element &&
-      g_object_class_find_property(G_OBJECT_GET_CLASS(element), "accept-self-signed")) {
-    // Can't always rely on HTTPS streams to have a valid 3rd-party-signed
-    // certificate, so tell neonhttpsrc to accept self-signed certificates.
-    g_object_set(element, "accept-self-signed", true, NULL);
-  }
 }
 
 void GstEnginePipeline::TransitionToNext() {