remove unused TableMaskFilter

include/effects/SkTableMaskFilter.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 SkTableMaskFilter_DEFINED
-#define SkTableMaskFilter_DEFINED
-
-#include "SkMaskFilter.h"
-#include "SkScalar.h"
-
-/** \class SkTableMaskFilter
-
-    Applies a table lookup on each of the alpha values in the mask.
-    Helper methods create some common tables (e.g. gamma, clipping)
- */
-class SK_API SkTableMaskFilter : public SkMaskFilter {
-public:
-    /** Utility that sets the gamma table
-     */
-    static void MakeGammaTable(uint8_t table[256], SkScalar gamma);
-
-    /** Utility that creates a clipping table: clamps values below min to 0
-        and above max to 255, and rescales the remaining into 0..255
-     */
-    static void MakeClipTable(uint8_t table[256], uint8_t min, uint8_t max);
-
-    static SkMaskFilter* Create(const uint8_t table[256]) {
-        return new SkTableMaskFilter(table);
-    }
-
-    static SkMaskFilter* CreateGamma(SkScalar gamma) {
-        uint8_t table[256];
-        MakeGammaTable(table, gamma);
-        return new SkTableMaskFilter(table);
-    }
-
-    static SkMaskFilter* CreateClip(uint8_t min, uint8_t max) {
-        uint8_t table[256];
-        MakeClipTable(table, min, max);
-        return new SkTableMaskFilter(table);
-    }
-
-    SkMask::Format getFormat() const override;
-    bool filterMask(SkMask*, const SkMask&, const SkMatrix&, SkIPoint*) const override;
-
-    SK_TO_STRING_OVERRIDE()
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTableMaskFilter)
-
-protected:
-    virtual ~SkTableMaskFilter();
-
-    void flatten(SkWriteBuffer&) const override;
-
-private:
-    SkTableMaskFilter();
-    explicit SkTableMaskFilter(const uint8_t table[256]);
-
-    uint8_t fTable[256];
-
-    typedef SkMaskFilter INHERITED;
-};
-
-#endif