Remove UnusedParam.h

Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp

Index: Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp
diff --git a/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp b/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp
index d50a3582acdde779c097b8662d653b9faf77e15f..6f68e475f1e6fb935d1a30b986191849a830a464 100644
--- a/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp
+++ b/Source/core/rendering/svg/SVGTextLayoutEngineSpacing.cpp
@@ -29,8 +29,6 @@
 #include "core/svg/SVGFontData.h"
 #include "core/svg/SVGFontElement.h"
 #include "core/svg/SVGFontFaceElement.h"
-#else
-#include "wtf/UnusedParam.h"
 #endif
 
 namespace WebCore {
@@ -77,8 +75,6 @@ float SVGTextLayoutEngineSpacing::calculateSVGKerning(bool isVerticalText, const
     kerning *= m_font.size() / m_font.fontMetrics().unitsPerEm();
     return kerning;
 #else
-    UNUSED_PARAM(isVerticalText);
-    UNUSED_PARAM(currentGlyph);
     return false;
 #endif
 }