Remove conditional lines index buffer

[leozide]

[j6t]

What is this about? Would it help adding conditional lines to tube-like synthesized hoses?

[leozide]

Conditional lines don't have duplicate vertices, there should only be 1 section per mesh and they are in order so the index buffer is unnecessary.

It would make it easier to add them to synth parts because it's 1 less thing to do but the index buffer will be trivial to fill as it's just 0...NVerts-1.