cleanup _has plot types possibly used to be applied in streambed

Author: archmoj

src/plots/plots.js

@@ -461,15 +461,6 @@ plots.supplyDefaults = function(gd, opts) {
         newFullLayout.images.length === 0
     );
 
-    // TODO remove in v2.0.0
-    // add has-plot-type refs to fullLayout for backward compatibility
-    newFullLayout._hasCartesian = newFullLayout._has('cartesian');
-    newFullLayout._hasGeo = newFullLayout._has('geo');
-    newFullLayout._hasGL3D = newFullLayout._has('gl3d');
-    newFullLayout._hasGL2D = newFullLayout._has('gl2d');
-    newFullLayout._hasTernary = newFullLayout._has('ternary');
-    newFullLayout._hasPie = newFullLayout._has('pie');
-
     // relink / initialize subplot axis objects
     plots.linkSubplots(newFullData, newFullLayout, oldFullData, oldFullLayout);