Refs #5300: Fix 's createFromJson

lib/pipeline/documentSources/GeoNearDocumentSource.js

@@ -82,7 +82,7 @@ proto.serialize = function(explain) {
 
 klass.createFromJson = function(jsonElement, ctx) {
 	var out = new GeoNearDocumentSource(ctx);
-	out.parseOptions(JSON.parse(jsonElement));
+	out.parseOptions(jsonElement);
 	return out;
 };