remove the (very) old DateGraph symbol

diff --git a/dygraph.js b/dygraph.js
index 8f35794..892f2c9 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -3629,6 +3629,3 @@ Dygraph.addAnnotationRule = function() {
 
   this.warn("Unable to add default annotation CSS rule; display may be off.");
 };
-
-// Older pages may still use this name.
-var DateGraph = Dygraph;