Remove UnusedParam.h

Source/platform/text/TextBreakIteratorICU.cpp

Index: Source/platform/text/TextBreakIteratorICU.cpp
diff --git a/Source/platform/text/TextBreakIteratorICU.cpp b/Source/platform/text/TextBreakIteratorICU.cpp
index 43095e9bc12fb836e80f99a9ff6d58800d77d334..7f31a38b7361623971ef0b2d59dfd5919a5e57a7 100644
--- a/Source/platform/text/TextBreakIteratorICU.cpp
+++ b/Source/platform/text/TextBreakIteratorICU.cpp
@@ -168,13 +168,8 @@ static UText* textClone(UText* destination, const UText* source, UBool deep, UEr
     return destination;
 }
 
-static int32_t textExtract(UText* text, int64_t start, int64_t limit, UChar* destination, int32_t destinationCapacity, UErrorCode* errorCode)
+static int32_t textExtract(UText*, int64_t, int64_t, UChar*, int32_t, UErrorCode* errorCode)
 {
-    UNUSED_PARAM(text);
-    UNUSED_PARAM(start);
-    UNUSED_PARAM(limit);
-    UNUSED_PARAM(destination);
-    UNUSED_PARAM(destinationCapacity);
     // In the present context, this text provider is used only with ICU functions
     // that do not perform an extract operation.
     ASSERT_NOT_REACHED();