Deletion of TIP31 (2nd nomination)

Comment: In addition to being too technical,  applies here as well. If there is something noteworthy about such a specific type of transistor, someone should be able to write a decent general overview in Bipolar junction transistor and split the content out. This doesn't seem to pass that test
Stance: delete
Cited policy: Wikipedia:What Wikipedia is not (WP:NOTCATALOGUE)