Remove zindex from funnelarea

Author: Farkites

src/traces/funnelarea/attributes.js

@@ -98,15 +98,5 @@ module.exports = {
         description: [
             'Sets the ratio between bottom length and maximum top length.'
         ].join(' ')
-    },
-    zindex: {
-        valType: 'integer',
-        dflt: 0,
-        editType: 'calc',
-        description: [
-            'Sets the layer on which this trace is displayed, relative to ',
-            'other traces on the same axes. Traces with higher `zindex` ',
-            'appear in front of those with lower `zindex`.'
-        ].join(' ')
     }
 };

src/traces/funnelarea/defaults.js

@@ -69,5 +69,4 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
 
     coerce('aspectratio');
     coerce('baseratio');
-    coerce('zindex');
 };