drop deprecated bar & histogram `bardir` in v3

[archmoj]

plotly.js/src/traces/bar/attributes.js

Lines 231 to 238 in 206d117

	_deprecated: {
	bardir: {
	valType: 'enumerated',
	editType: 'calc',
	values: ['v', 'h'],
	description: 'Renamed to `orientation`.'
	}
	}

and

plotly.js/src/traces/histogram/attributes.js

Lines 249 to 251 in 206d117

	_deprecated: {
	bardir: barAttrs._deprecated.bardir
	},