Remove unused Make Streamable option from scene import dialog

[Calinou]

The option doesn't do anything when enabled, as Godot doesn't have mesh streaming or texture streaming implemented yet.

[fire]

This feature isn't in so I'm ok hiding it. Does anyone know when it was added. We might have to delete and add back with a new name though. So maybe leave a comment to show it was here.

[fire]

There's also making the option "internal" thus hiding it but avoiding compatibility problems and providing documentation.

[aaronfranke]

@fire It was added in PR #47166

[akien-mga]

Thanks!

[catboy-catfish]

I thought mesh streaming was already implemented because of LOD support?

[Calinou]

I thought mesh streaming was already implemented because of LOD support?

For future reference, mesh streaming is not the same as automatic LOD support. When a mesh uses automatic LOD, all its LODs are still present in memory whenever the mesh is loaded. Likewise, if a mesh's LOD is displayed, the full-detail mesh is still stored in memory.

LOD levels also affect the entire mesh at once. It isn't currently possible to have the mesh be split into several smaller parts that can be individually culled or displayed at a different LOD level.