[DevTools] remove old console.assert hack

New console.assert implementation is faster then any hacks.

BUG=chromium:663845
R=lushnikov@chromium.org

Review-Url: https://codereview.chromium.org/2525543002
Cr-Commit-Position: refs/heads/master@{#435081}

third_party/WebKit/Source/devtools/front_end/platform/utilities.js

@@ -26,15 +26,6 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-// FIXME: This performance optimization should be moved to blink so that all developers could enjoy it.
-// console is retrieved with V8Window.getAttribute method which is slow. Here we copy it to a js variable for faster access.
-console = console;
-console.__originalAssert = console.assert;
-console.assert = function(value, message) {
-  if (value)
-    return;
-  console.__originalAssert(value, message);
-};
 
 /** @typedef {Array|NodeList|Arguments|{length: number}} */
 var ArrayLike;