Most likely deleted; simply because we, the members of this forum basically have nothing to gain or learn on the topic poll you made.
If you really want the specific reason on why it has been deleted though, maybe try messaging some MODs. I doubt they would reply though.
Thank you for the time...
About deleting any topic, or post...
MODs, gives us message right?
Why I did'nt receive any messages about deleting my poll??