Cleanup from r175379

Cleanup from r175379
https://bugs.webkit.org/show_bug.cgi?id=138616

Reviewed by Simon Fraser.

Source/WebCore:

No new tests because there is no behavior change.

* WebCore.exp.in:
* platform/ios/WebCoreSystemInterfaceIOS.mm:
* platform/mac/WebCoreSystemInterface.h:
* platform/mac/WebCoreSystemInterface.mm:

Source/WebKit/mac:

* WebCoreSupport/WebSystemInterface.mm:
(InitWebCoreSystemInterface):
* WebKit.order:

Source/WebKit2:

* WebProcess/WebCoreSupport/mac/WebSystemInterface.mm:
(InitWebCoreSystemInterface):
* mac/WebKit2.order:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@175961 268f45cc-cd09-0410-ab3c-d52691b4dbfc