Revert "Add SkImage::makeColorSpace() with correct transfer fn behavior"

Revert "Add SkImage::makeColorSpace() with correct transfer fn behavior"

This reverts commit 9ad0531a18f854e5a2c8034880140dd6cd3ea3c1.

Reason for revert: Does not handle transfer fn behavior.

Original change's description:
> Add SkImage::makeColorSpace() with correct transfer fn behavior
>
> Completes implementation for lazy and raster images.  gpu is
> still a TODO.
>
> Bug: skia:6553
> Change-Id: I04eea5c4fb53c50c0406c2e6b6778b0e21fd85f8
> Reviewed-on: https://skia-review.googlesource.com/14403
> Commit-Queue: Matt Sarett <msarett@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
>

TBR=mtklein@google.com,msarett@google.com,brianosman@google.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I3830321aea7d0dc5ab38a40f3318bb53a41df383
Reviewed-on: https://skia-review.googlesource.com/15306
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>