Remove SkNEW_APPEND_TO_TARRAY.

The use of SkNEW_APPEND_TO_TARRAY is now better served by
SkTArray::emplace_back(...) which should now be used instead. The
existing users of SkNEW_APPEND_TO_TARRAY are converted and the code
relating to SkNEW_APPEND_TO_TARRAY is removed.

TBR=reed
This only removes code. The file should also be made private.

Review URL: https://codereview.chromium.org/1682083002
diff --git a/tests/TextBlobCacheTest.cpp b/tests/TextBlobCacheTest.cpp
index 6aa6c20..c2907fc 100644
--- a/tests/TextBlobCacheTest.cpp
+++ b/tests/TextBlobCacheTest.cpp
@@ -126,7 +126,7 @@
                     }
                 }
             }
-            SkNEW_APPEND_TO_TARRAY(&blobs, TextBlobWrapper, (builder.build()));
+            blobs.emplace_back(builder.build());
         }
     }