.hgignore: delete some dregs I'd rather delete the file but I doubt that will be popular.
.hgignore: delete some dregs
I'd rather delete the file but I doubt that will be popular.

LGTM=adg
R=golang-codereviews, adg
CC=golang-codereviews
https://codereview.appspot.com/150100043

tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go