Revert of Add compressed texture capabilities for GPU devices (https://codereview.chromium.org/292323003/)

Reason for revert:
Signeness comparison breaks build. After working some more, I think the API design will be cleaner without the Uncompressed enum, so I'm removing it and retesting everything.

Original issue's description:
> Add compressed texture capabilities for GPU devices
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14880

R=bsalomon@google.com, robertphillips@google.com, halcanary@google.com
TBR=bsalomon@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: krajcevski@google.com

Review URL: https://codereview.chromium.org/296313003

git-svn-id: http://skia.googlecode.com/svn/trunk@14883 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed