Make SkGraphics::Term a no-op, stop calling it.

I'd remove it entirely but Android is calling it explicitly.

BUG=skia:4259

Committed: https://skia.googlesource.com/skia/+/925979f733fe8e70d84627147dee04d030423349

Review URL: https://codereview.chromium.org/1329853005
diff --git a/include/core/SkGraphics.h b/include/core/SkGraphics.h
index 8e8bd77..5aecc7a 100644
--- a/include/core/SkGraphics.h
+++ b/include/core/SkGraphics.h
@@ -23,10 +23,8 @@
      */
     static void Init();
 
-    /**
-     *  Call this to release any memory held privately, such as the font cache.
-     */
-    static void Term();
+    // We're in the middle of cleaning this up.
+    static void Term() {}
 
     /**
      *  Return the version numbers for the library. If the parameter is not
@@ -169,9 +167,6 @@
     SkAutoGraphics() {
         SkGraphics::Init();
     }
-    ~SkAutoGraphics() {
-        SkGraphics::Term();
-    }
 };
 
 #endif