Is this rot or lack of sunlight? Should I remove the leaf?

[garnetscherzo]

I found this spot on my orchid leaf this morning. I'm not sure if it needs to be cut off as it doesn't feel wet, and it doesn't smell bad, so it doesn't seem like it's a bacterial infection. The roots seem very healthy and the plant is growing a new leaf otherwise. I had recently repositioned this orchid so that this leaf might not be getting enough sunlight, so I was thinking potentially it's from lack of sun that's caused the yellowing. Any thoughts?