Merge pull request godotengine#99841 from Calinou/doc-basematerial3d-billboard-mode-remove-outdated-note

Remove outdated note about `BaseMaterial3D.billboard_mode` shadow issue

Author: akien-mga

doc/classes/BaseMaterial3D.xml

@@ -125,7 +125,6 @@
 		</member>
 		<member name="billboard_mode" type="int" setter="set_billboard_mode" getter="get_billboard_mode" enum="BaseMaterial3D.BillboardMode" default="0">
 			Controls how the object faces the camera. See [enum BillboardMode].
-			[b]Note:[/b] When billboarding is enabled and the material also casts shadows, billboards will face [b]the[/b] camera in the scene when rendering shadows. In scenes with multiple cameras, the intended shadow cannot be determined and this will result in undefined behavior. See [url=https://github.com/godotengine/godot/pull/72638]GitHub Pull Request #72638[/url] for details.
 			[b]Note:[/b] Billboard mode is not suitable for VR because the left-right vector of the camera is not horizontal when the screen is attached to your head instead of on the table. See [url=https://github.com/godotengine/godot/issues/41567]GitHub issue #41567[/url] for details.
 		</member>
 		<member name="blend_mode" type="int" setter="set_blend_mode" getter="get_blend_mode" enum="BaseMaterial3D.BlendMode" default="0">