Remove unused SkGlyphCache::VisitAllCaches.

src/core/SkGlyphCache.h

Index: src/core/SkGlyphCache.h
diff --git a/src/core/SkGlyphCache.h b/src/core/SkGlyphCache.h
index 2939eaa678f99f0201a9205b2963dfcd24f435da..e27b34cfec12a03e5f27113b15f494bfb1dcaa69 100644
--- a/src/core/SkGlyphCache.h
+++ b/src/core/SkGlyphCache.h
@@ -121,12 +121,6 @@ public:
 
     SkScalerContext* getScalerContext() const { return fScalerContext; }
 
-    /** Call proc on all cache entries, stopping early if proc returns true.
-        The proc should not create or delete caches, since it could produce
-        deadlock.
-    */
-    static void VisitAllCaches(bool (*proc)(SkGlyphCache*, void*), void* ctx);
-
     /** Find a matching cache entry, and call proc() with it. If none is found
         create a new one. If the proc() returns true, detach the cache and
         return it, otherwise leave it and return NULL.