I don't think there is a single word that captures "died from neglect". Most of the answers till now capture the "neglected" part but not "died from neglect". Wither came close but still no cigar. Although, there is an idiom based on wither that exactly fits:
wither on the vine (also die on the vine)
Fig. [for someone or something] to be ignored or neglected and thereby be wasted.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
if something withers on the vine, it is destroyed very gradually, usually because no one does anything to help or support it
Cambridge Idioms Dictionary
It can be used in software-related contexts also. Here is an excerpt from the book Software Project Survival Guide by Steve McConnell (1997):
About two million people are working on about 300,000 software projects in the United States at this time. Between one third and two thirds of those projects will exceed their schedule and budget targets before they are delivered. Of the most expensive software projects, about half will eventually be canceled for being out of control. Many more are canceled in subtle ways—they are left to wither on the vine, or their sponsors simply declare victory and leave the battlefield without any new software to show for their trouble.