chameleon: Remove updatable/python2.7/ from MANIFEST.in

The updatable/python2.7/ has been removed. Remove it from MANIFEST.in,
too.

BUG=b:159192174
TEST=None

Change-Id: I68dd708a382a741b3a25bcf5427cdc44b026181b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/chameleon/+/2835456
Reviewed-by: Shyh-In Hwang <josephsih@chromium.org>
Commit-Queue: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Tested-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
1 file changed