Remove runtime test for concise methods

The runtime tests have been removed.

LOG=N
BUG=None
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/560893002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/runtime-gen/functionisconcisemethod.js

-// Copyright 2014 the V8 project authors. All rights reserved.
-// AUTO-GENERATED BY tools/generate-runtime-tests.py, DO NOT MODIFY
-// Flags: --allow-natives-syntax --harmony --harmony-proxies
-var _f = function() {};
-%FunctionIsConciseMethod(_f);