Delete the legacy SVG parser

src/svg/parser/SkSVGText.h

-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#ifndef SkSVGText_DEFINED
-#define SkSVGText_DEFINED
-
-#include "SkSVGElements.h"
-
-class SkSVGText : public SkSVGElement {
-    DECLARE_SVG_INFO(Text);
-protected:
-    SkString f_x;
-    SkString f_y;
-    SkString f_text;    // not an attribute
-private:
-    typedef SkSVGElement INHERITED;
-    friend class SkSVGParser;
-};
-
-class SkSVGTspan : public SkSVGText {
-    DECLARE_SVG_INFO(Tspan);
-private:
-    typedef SkSVGText INHERITED;
-};
-
-#endif // SkSVGText_DEFINED