remove VignetteBuilder field (as we have no vignettes)

kevinushey · kevinushey · commit 152db40eaf78 · 2016-04-20T10:00:51.000-07:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -35,4 +35,3 @@ Collate:
    'build.R'
    'hooks.R'
    'options.R'
-VignetteBuilder: knitr
