[webcrypto] Remove ifdef that is no longer needed.

BUG=373917
TBR=abarth

Review URL: https://codereview.chromium.org/345593004

git-svn-id: svn://svn.chromium.org/blink/trunk@176471 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/platform/WebCrypto.h

@@ -44,9 +44,6 @@ namespace WebCore { class CryptoResult; }
 namespace WTF { template <typename T> class PassRefPtr; }
 #endif
 
-// FIXME: Remove once chromium side rolls.
-#define WEBCRYPTO_RESULT_ACCEPTS_JSON 1
-
 namespace blink {
 
 class WebArrayBuffer;