diff --git a/lib/adf_variable_defaults.yaml b/lib/adf_variable_defaults.yaml
index bb77e9232..61620e73f 100644
--- a/lib/adf_variable_defaults.yaml
+++ b/lib/adf_variable_defaults.yaml
@@ -691,9 +691,6 @@ CO:
   pct_diff_colormap: "PuOr_r"
   scale_factor: 1000000000.0
   new_unit: "ppbv"
-  #pct_diff_contour_range: [0.0, 100.0, 5.0] 
-  pct_diff_contour_levels: [-100,-75,-50,-40,-30,-20,-10,-8,-6,-4,-2,0,2,4,6,8,10,20,30,40,50,75,100]
-  pct_diff_colormap: "PuOr_r"
 CO01:
   category: "Composition"
   #contour_levels_range: [0.0,150.0,10.0]