Revert of BitmapTextBatch and BitmapTextBlob (patchset #18 id:360001 of https://codereview.chromium.org/1011403004/)

Reason for revert:
Breaks a unit test on mac

Original issue's description:
> BitmapTextBatch and BitmapTextBlob
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/eed1dae04932483579b02c10f0706127d3f5d984

TBR=fmalita@chromium.org,reed@google.com,jvanverth@google.com,robertphillips@google.com,bsalomon@google.com,jvanverth@chromium.org,joshualitt@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1050633002