remove gnats "id" tag from committers article

[jgh]

Summary

Missed one ref. of gnats in committers article.

[bcr]

Have you checked whether some other of our documents link to that section? I guess that link has been changed already as well. Finding broken links is a different beast altogether, but checking might not hurt.

[bcr]

I don't want to block this change with my suggestion longer than necessary. It's for me to commit.

[jgh]

updated to fix link off of internal documentation link to committers-guide anchor.

[bcr]

Cool, got one. ;-)
Go ahead!