Remove imageloaderd from the supplemental groups.

imageloaderd user was incorrectly included in the supplement groups of
the imageloaderd group. This removes it.

BUG=chromium:630421
TEST=build_packages and build_image and flash

Change-Id: Iee93bb0830f91ad44796447134fcf486eadcb54c
Reviewed-on: https://chromium-review.googlesource.com/408670
Commit-Ready: Greg Kerr <kerrnel@chromium.org>
Tested-by: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/profiles/base/accounts/group/imageloaderd b/profiles/base/accounts/group/imageloaderd
index 094b073..f17e44e 100644
--- a/profiles/base/accounts/group/imageloaderd
+++ b/profiles/base/accounts/group/imageloaderd
@@ -1,3 +1,2 @@
 group:imageloaderd
 gid:220
-users:imageloaderd