Revert of Fix compilation error when building with clang on Linux. (https://codereview.chromium.org/287193006/)

Reason for revert:
need to revert this along with reverting the big unitmapper cl

Original issue's description:
> Fix compilation error when building with clang on Linux.
>
> ../../src/effects/gradients/SkGradientShader.cpp:487:22: error: unused
> function 'bitsTo16' [-Werror,-Wunused-function]
> static inline U16CPU bitsTo16(unsigned x, const unsigned bits) {
>
> R=bsalomon@google.com
> TEST=make tests
>
> Committed: http://code.google.com/p/skia/source/detail?r=14835

R=bsalomon@google.com, reed@google.com, tfarina@chromium.org
TBR=bsalomon@google.com, reed@google.com, tfarina@chromium.org
NOTREECHECKS=true
NOTRY=true

Author: reed@chromium.org

Review URL: https://codereview.chromium.org/297803010

git-svn-id: http://skia.googlecode.com/svn/trunk@14839 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed