Remove unused UseCounter features

Source/core/frame/UseCounter.h

Index: Source/core/frame/UseCounter.h
diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h
index a9ebae8e01b73ddaea87dbed489c094673632ef5..33ccbf295f89799044ab3dc75b63e650e1e0df5d 100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -228,8 +228,6 @@ public:
 
         InitMessageEvent = 222,
         PrefixedMediaCancelKeyRequest = 229,
-        DOMImplementationHasFeature = 230,
-        DOMImplementationHasFeatureReturnFalse = 231,
         CanPlayTypeKeySystem = 232,
         PrefixedDevicePixelRatioMediaFeature = 233,
         PrefixedMaxDevicePixelRatioMediaFeature = 234,
@@ -268,16 +266,12 @@ public:
         DocumentReleaseEvents = 288,
         WindowCaptureEvents = 289,
         WindowReleaseEvents = 290,
-        ElementAnimateKeyframeListEffectObjectTiming = 292,
-        ElementAnimateKeyframeListEffectDoubleTiming = 293,
-        ElementAnimateKeyframeListEffectNoTiming = 294,
         DocumentXPathCreateExpression = 295,
         DocumentXPathCreateNSResolver = 296,
         DocumentXPathEvaluate = 297,
         AttrGetValue = 298,
         AttrSetValue = 299,
         AnimationConstructorKeyframeListEffectObjectTiming = 300,
-        AnimationConstructorKeyframeListEffectDoubleTiming = 301,
         AnimationConstructorKeyframeListEffectNoTiming = 302,
         AttrSetValueWithElement = 303,
         PrefixedCancelAnimationFrame = 304,
@@ -405,7 +399,6 @@ public:
         EditingAppleStyleSpanClass = 461,
         EditingAppleTabSpanClass = 462,
         HTMLImportsAsyncAttribute = 463,
-        FontFaceSetReady = 464,
         XMLHttpRequestSynchronous = 465,
         CSSSelectorPseudoUnresolved = 466,
         CSSSelectorPseudoShadow = 467,
@@ -447,7 +440,6 @@ public:
         UIEventLayerY = 512,
         UIEventPageX = 513,
         UIEventPageY = 514,
-        DevToolsConsoleTimeline = 517,
         DevToolsConsoleProfile = 518,
         SVGStyleElementTitle = 519,
         PictureSourceSrc = 520,
@@ -459,8 +451,6 @@ public:
         SrcsetWDescriptor = 524,
         SelectionContainsNode = 525,
         MediaStreamEnded = 526,
-        MixedContentPrivateIPInPublicWebsitePassive = 527,
-        MixedContentPrivateIPInPublicWebsiteActive = 528,
         XMLExternalResourceLoad = 529,
         MixedContentPrivateHostnameInPublicHostname = 530,
         LegacyProtocolEmbeddedAsSubresource = 531,
@@ -511,7 +501,6 @@ public:
         RenderRuby = 576,
         CanvasRenderingContext2DCompositeOperationDarker = 577,
         ScriptElementWithInvalidTypeHasSrc = 578,
-        TimelineStart = 579,
         ElementBaseURIFromXMLBase = 580,
         XMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload = 581,
         CSSSelectorPseudoScrollbar = 582,
@@ -528,7 +517,6 @@ public:
         // The above items are available in M40 branch.
 
         SetReferrerPolicy = 593,
-        DOMImplementationHasFeatureReturnFalseInternal = 594,
         MouseEventWhich = 595,
         UIEventCharCode = 596,
         UIEventKeyCode = 597,
@@ -575,7 +563,6 @@ public:
         AudioContextCreatePanner = 644,
         AudioContextCreatePeriodicWave = 645,
         AudioContextCreateScriptProcessor = 646,
-        AudioContextCreateStereoPanner = 647,
         AudioContextCreateWaveShaper = 648,
         AudioContextDecodeAudioData = 649,
         AudioContextResume = 650,
@@ -616,7 +603,6 @@ public:
         ServiceWorkerClientPostMessage = 690,
         CSSZoomNotEqualToOne = 691,
         SVGGraphicsElementGetTransformToElement = 692,
-        ServiceWorkerClientsGetAll = 693,
         // The above items are available in M42 branch.
 
         ClientRectListItem = 694,