https://bugs.webkit.org/show_bug.cgi?id=126772

Reviewed by Beth Dakin.

Source/WebCore:

This setting was added in https://bugs.webkit.org/show_bug.cgi?id=99716 for the Chromium port
and is unused by everyone else so get rid of it.

* loader/FrameLoader.cpp:
(WebCore::createWindow):
* page/ContextMenuController.cpp:
(WebCore::openNewWindow):
* page/Settings.in:

LayoutTests:

* fast/dom/HTMLAnchorElement/anchor-no-multiple-windows-expected.txt: Removed.
* fast/dom/HTMLAnchorElement/anchor-no-multiple-windows.html: Removed.
* fast/dom/Window/window-open-no-multiple-windows-expected.txt: Removed.
* fast/dom/Window/window-open-no-multiple-windows.html: Removed.
* fast/forms/post-popup-no-multiple-windows-expected.txt: Removed.
* fast/forms/post-popup-no-multiple-windows.html: Removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161663 268f45cc-cd09-0410-ab3c-d52691b4dbfc