Someone was recently promoted on another team which left their old position available, and now it's currently up for grabs for a few individuals. On behalf of my previous manager, HR has sent an email to myself and several other coworkers (I don't know who or how many) to fill the position.
While I'm not interested in the position, should I respond to my manager thanking him for the offer? In my mind I liken it to someone holding up a box with the last doughnut in it and saying "Hey, Bob wants to know if anyone wants the last doughnut", and I feel would be weird to turn to Bob and say "No thanks, but I really appreciate the offer Bob!"
tl;dr Does this acknowledgement of my potential warrant a response?