Revert of SSE2 everywhere. (https://codereview.chromium.org/294963002/)

Reason for revert:
Making GM run fewer tests than expected?

Original issue's description:
> SSE2 everywhere.
>
> As of M35, Chrome will require SSE2 on Linux (it already did on Windows, and
> requires SSSE3 on Macs).  Android already requires SSE2 for x86 chips.
>
> This effectively just forces it on for 32-bit Linux builds; everyone else already had it.
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14800

R=reed@google.com, mtklein@chromium.org
TBR=mtklein@chromium.org, reed@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/282093015

git-svn-id: http://skia.googlecode.com/svn/trunk@14803 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/common_conditions.gypi

@@ -14,11 +14,6 @@
       ],
     }],
 
-    # As of M35, Chrome requires SSE2 on x86 (and SSSE3 on Mac).
-    [ 'skia_arch_type == "x86"', {
-      'cflags': [ '-msse2' ],
-    }],
-
     [ 'skia_os == "win"',
       {
         'defines': [