remove empty '_deprecated' keys

Author: emilykl

src/components/colorbar/attributes.js

@@ -228,7 +228,4 @@ module.exports = overrideAll({
             ].join(' ')
         }
     },
-
-    _deprecated: {
-    }
 }, 'colorbars', 'from-root');

src/plots/gl3d/layout/axis_attributes.js

@@ -121,6 +121,4 @@ module.exports = overrideAll({
     zeroline: axesAttrs.zeroline,
     zerolinecolor: axesAttrs.zerolinecolor,
     zerolinewidth: axesAttrs.zerolinewidth,
-    _deprecated: {
-    }
 }, 'plot', 'from-root');

src/plots/layout_attributes.js

@@ -451,6 +451,4 @@ module.exports = {
         ].join(' '),
         editType: 'none'
     }),
-    _deprecated: {
-    }
 };

src/plots/polar/layout_attributes.js

@@ -146,9 +146,6 @@ var radialAxisAttrs = {
     },
 
     editType: 'calc',
-
-    _deprecated: {
-    }
 };
 
 extendFlat(

src/plots/ternary/layout_attributes.js

@@ -62,8 +62,6 @@ var ternaryAxesAttrs = {
             'all the minima set to zero.'
         ].join(' ')
     },
-    _deprecated: {
-    }
 };
 
 var attrs = module.exports = overrideAll({

src/traces/carpet/axis_attributes.js

@@ -451,9 +451,5 @@ module.exports = {
         editType: 'calc',
         description: 'The stride between grid lines along the axis'
     },
-
-    _deprecated: {
-    },
-
     editType: 'calc'
 };

src/traces/pie/attributes.js

@@ -292,7 +292,4 @@ module.exports = {
             'or an array to highlight one or more slices.'
         ].join(' ')
     },
-
-    _deprecated: {
-    }
 };