SDK overlay: remove Contacts dependency from UIKit

The SDK headers don't have this dependency.  Looks like it was added by
mistake.

rdar://problem/26190517

Author: gribozavr

stdlib/public/SDK/UIKit/CMakeLists.txt

@@ -3,7 +3,7 @@ add_swift_library(swiftUIKit IS_SDK_OVERLAY
   UIKit.swift
   TARGET_SDKS IOS IOS_SIMULATOR TVOS TVOS_SIMULATOR WATCHOS WATCHOS_SIMULATOR
   SWIFT_MODULE_DEPENDS ObjectiveC Foundation
-  SWIFT_MODULE_DEPENDS_IOS Contacts CoreImage
+  SWIFT_MODULE_DEPENDS_IOS CoreImage
   SWIFT_MODULE_DEPENDS_TVOS CoreImage
   SWIFT_COMPILE_FLAGS_WATCHOS -Xfrontend -disable-autolink-framework -Xfrontend CoreText
   FRAMEWORK_DEPENDS UIKit)