Remove scattergl zindex

Author: Farkites

src/traces/scattergl/attributes.js

@@ -101,4 +101,3 @@ var attrs = module.exports = overrideAll({
 attrs.x.editType = attrs.y.editType = attrs.x0.editType = attrs.y0.editType = 'calc+clearAxisTypes';
 attrs.hovertemplate = scatterAttrs.hovertemplate;
 attrs.texttemplate = scatterAttrs.texttemplate;
-attrs.zindex = scatterAttrs.zindex

test/plot-schema.json

@@ -55571,12 +55571,6 @@
      "description": "Sets the source reference on Chart Studio Cloud for `y`.",
      "editType": "none",
      "valType": "string"
-    },
-    "zindex": {
-     "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`.",
-     "dflt": 0,
-     "editType": "calc",
-     "valType": "integer"
     }
    },
    "categories": [