[Cocoa] Remove Yosemite-specific font lookup code

[Cocoa] Remove Yosemite-specific font lookup code
https://bugs.webkit.org/show_bug.cgi?id=168682

Reviewed by Zalan Bujtas.

Source/WebCore:

No new tests because there is no behavior change.

* platform/graphics/cocoa/FontCacheCoreText.cpp:
(WebCore::platformFontLookupWithFamily):
(WebCore::fontWithFamily):
* platform/graphics/mac/FontCacheMac.mm:
(WebCore::platformInvalidateFontCache):
(WebCore::acceptableChoice): Deleted.
(WebCore::betterChoice): Deleted.
(WebCore::desiredFamilyToAvailableFamilyMap): Deleted.
(WebCore::hasDesiredFamilyToAvailableFamilyMapping): Deleted.
(WebCore::rememberDesiredFamilyToAvailableFamilyMapping): Deleted.
(WebCore::toAppKitFontWeight): Deleted.
(WebCore::appkitWeightToFontWeight): Deleted.
(WebCore::toNSFontTraits): Deleted.
(WebCore::platformFontWithFamily): Deleted.

Source/WTF:

* wtf/Platform.h:

Tools:

* DumpRenderTree/mac/DumpRenderTree.mm:
(fontWhitelist):
(adjustFonts):
(createWebViewAndOffscreenWindow):
(drt_NSFontManager_availableFontFamilies): Deleted.
(drt_NSFontManager_availableFonts): Deleted.
(swizzleNSFontManagerMethods): Deleted.
* WebKitTestRunner/InjectedBundle/cocoa/ActivateFontsCocoa.mm:
(WTR::activateFonts):
(WTR::allowedFontFamilySet): Deleted.
(WTR::systemHiddenFontFamilySet): Deleted.
(WTR::wtr_NSFontManager_availableFontFamilies): Deleted.
(WTR::wtr_NSFontManager_availableFonts): Deleted.
(WTR::swizzleNSFontManagerMethods): Deleted.
* WebKitTestRunner/mac/TestControllerMac.mm:
(WTR::generateWhitelist):
(WTR::TestController::platformInitializeContext):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@212876 268f45cc-cd09-0410-ab3c-d52691b4dbfc