Deletion of The Polyphonics

Comment: I'm the editor who tagged this article in 2010. There were significant COI, PROMO and NN concerns at the time. While I'd addressed the worst of the some of the former, the latter concerns remain.  is not met. Nor is . I cannot but agree with the nomination
Stance: delete
Cited policy: Wikipedia:Notability (WP:NBAND||WP:SIGCOV)