[web-animations-1] Drop unnecessary CompositeOperation dfn

Author: birtles

web-animations-1/Overview.bs

@@ -5676,7 +5676,7 @@ The {{KeyframeEffect}} interface {#the-keyframeeffect-interface}
   ::
       The [=composite operation=] used
       to composite this [=keyframe effect=] with the [=effect stack=],
-      as specified by one of the [=CompositeOperation=] enumeration values.
+      as specified by one of the {{CompositeOperation}} enumeration values.
 
       On setting,
       sets the [=composite operation=] property of this [=animation effect=]
@@ -6585,7 +6585,7 @@ The {{KeyframeEffect}} interface {#the-keyframeeffect-interface}
   ::
       The [=composite operation=] used
       to composite this animation with the [=effect stack=],
-      as specified by one of the [=CompositeOperation=] enumeration values.
+      as specified by one of the {{CompositeOperation}} enumeration values.
       This is used for all [=keyframes=] that specify
       an {{CompositeOperationOrAuto/auto}}
       [=keyframe-specific composite operation=].
@@ -6600,7 +6600,7 @@ The {{CompositeOperation}} and {{CompositeOperationOrAuto}} enumerations {#the-c
 ------------------------------------------------------------------------
 
   The possible values of an [=keyframe effect=]’s composition behavior
-  are represented by the <dfn>CompositeOperation</dfn> enumeration.
+  are represented by the {{CompositeOperation}} enumeration.
 
   <xmp class=idl>
     enum CompositeOperation { "replace", "add", "accumulate" };