drop deprecated gl3d `cameraposition` in v3

[archmoj]

plotly.js/src/plots/gl3d/layout/layout_attributes.js

Lines 163 to 169 in 206d117

	_deprecated: {
	cameraposition: {
	valType: 'info_array',
	editType: 'camera',
	description: 'Obsolete. Use `camera` instead.'
	}
	}