move color4f docs to in progress

take color4f out of bookmakers completed list,
since it ain't so

TBR=brianosman@google.com,reed@google.com
NOTRY=true
Bug: skia:
Change-Id: I45af282964e2013e45909a0f8ca258eac0faaea9
Reviewed-on: https://skia-review.googlesource.com/156192
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
1 file changed