Remove Backslash-as-JPY hack

Source/wtf/text/TextEncoding.h

Index: Source/wtf/text/TextEncoding.h
diff --git a/Source/wtf/text/TextEncoding.h b/Source/wtf/text/TextEncoding.h
index 7ba35fe8cf399c8434b483ea3b0fe5a2da5d1d36..1e4aa7b3f683f8135a38cd9c8103a78086464b0b 100644
--- a/Source/wtf/text/TextEncoding.h
+++ b/Source/wtf/text/TextEncoding.h
@@ -42,26 +42,6 @@ public:
     bool isValid() const { return m_name; }
     const char* name() const { return m_name; }
     bool usesVisualOrdering() const;
-
-    bool hasTrivialDisplayString() const { return m_backslashAsCurrencySymbol == '\\'; }
-
-    PassRefPtr<StringImpl> displayString(PassRefPtr<StringImpl> str) const
-    {
-        if (hasTrivialDisplayString() || !str)
-            return str;
-        return str->replace('\\', m_backslashAsCurrencySymbol);
-    }
-    template <typename CharacterType>
-    void displayBuffer(CharacterType* characters, unsigned len) const
-    {
-        if (hasTrivialDisplayString())
-            return;
-        for (unsigned i = 0; i < len; ++i) {
-            if (characters[i] == '\\')
-                characters[i] = m_backslashAsCurrencySymbol;
-        }
-    }
-
     const TextEncoding& closestByteBasedEquivalent() const;
     const TextEncoding& encodingForFormSubmission() const;