drop deprecated surface `zauto`, `zmin` and `zmax` in v3

https://github.com/plotly/plotly.js/blob/206d117e01a79ff63b5a8f5f76d97e2b095e8ac5/src/traces/surface/attributes.js#L291-L301

	_deprecated: {
	zauto: extendFlat({}, colorScaleAttrs.zauto, {
	description: 'Obsolete. Use `cauto` instead.'
	}),
	zmin: extendFlat({}, colorScaleAttrs.zmin, {
	description: 'Obsolete. Use `cmin` instead.'
	}),
	zmax: extendFlat({}, colorScaleAttrs.zmax, {
	description: 'Obsolete. Use `cmax` instead.'
	})
	},

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