Remove [TypeChecking=Unrestricted] use in Source/core/

Source/core/animation/ComputedTimingProperties.idl

Index: Source/core/animation/ComputedTimingProperties.idl
diff --git a/Source/core/animation/ComputedTimingProperties.idl b/Source/core/animation/ComputedTimingProperties.idl
index d5e8e498f91c7e19459953539a7a3de48adf52f2..7e3edc10b3432ca170a37a8c2b426dbf605ca30f 100644
--- a/Source/core/animation/ComputedTimingProperties.idl
+++ b/Source/core/animation/ComputedTimingProperties.idl
@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-[
-    TypeChecking=Unrestricted,
-] dictionary ComputedTimingProperties : AnimationTimingProperties {
+dictionary ComputedTimingProperties : AnimationTimingProperties {
     double              startTime;
     unrestricted double endTime;
     unrestricted double activeDuration;