[GTK] Remove unnecessary GTK_CHECK_VERSION #ifdefs
https://bugs.webkit.org/show_bug.cgi?id=115914

Reviewed by Martin Robinson.

Source/WebCore:

* platform/graphics/gtk/FullscreenVideoControllerGtk.cpp:
(WebCore::FullscreenVideoControllerGtk::hideHud):
(WebCore::FullscreenVideoControllerGtk::initializeWindow):
* platform/gtk/GtkVersioning.c:
* platform/gtk/GtkVersioning.h:
* platform/gtk/WidgetRenderingContext.cpp:
(WebCore::WidgetRenderingContext::WidgetRenderingContext):
* plugins/gtk/gtk2xtbin.c:
(gtk_xtbin_realize):

Source/WebKit/gtk:

* WebCoreSupport/ChromeClientGtk.cpp:
(WebKit::ChromeClient::contentsSizeChanged):
* WebCoreSupport/FrameLoaderClientGtk.cpp:
(WebKit::FrameLoaderClient::transitionToCommittedForNewPage):
* tests/testapplicationcache.c:
* tests/testatk.c:
* tests/testatkroles.c:
(main):
* tests/testcontextmenu.c:
* tests/testcopyandpaste.c:
(main):
* tests/testdomdocument.c:
* tests/testdomdomwindow.c:
* tests/testdomnode.c:
* tests/testdownload.c:
(main):
* tests/testfavicondatabase.c:
(main):
* tests/testglobals.c:
* tests/testhittestresult.c:
* tests/testhttpbackend.c:
(main):
* tests/testkeyevents.c:
(main):
* tests/testloading.c:
* tests/testmimehandling.c:
(main):
* tests/testnetworkrequest.c:
(main):
* tests/testnetworkresponse.c:
(main):
* tests/testwebbackforwardlist.c:
(main):
* tests/testwebdatasource.c:
(main):
* tests/testwebframe.c:
(main):
* tests/testwebhistoryitem.c:
(main):
* tests/testwebinspector.c:
(main):
* tests/testwebplugindatabase.c:
(main):
* tests/testwebresource.c:
(main):
* tests/testwebsettings.c:
(main):
* tests/testwebview.c:
* tests/testwindow.c:
(main):
* webkit/webkitwebview.cpp:
(webkit_web_view_realize):
(webkit_web_view_show_help):
(webkit_web_view_class_init):
(webkit_web_view_set_tooltip_text):

Source/WebKit2:

* UIProcess/API/gtk/WebKitWebViewBase.cpp:
(webkitWebViewBaseRealize):

Tools:

* GtkLauncher/main.c:
(createToolbar):
* MiniBrowser/gtk/BrowserWindow.c:
(_BrowserWindow):
(browserWindowSetStatusText):
(fullScreenMessageTimeoutCallback):
(webViewEnterFullScreen):
(webViewLeaveFullScreen):
(browserWindowFinalize):
(browserWindowConstructed):
* WebKitTestRunner/gtk/EventSenderProxyGtk.cpp:
(WTR::EventSenderProxy::mouseScrollBy):
(WTR::EventSenderProxy::continuousMouseScrollBy):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149952 268f45cc-cd09-0410-ab3c-d52691b4dbfc