Remove an inspector-related test that makes use of devtools' localStorage

This test is implemented incorrectly and has started failing after Chromium r231565.

TBR=pfeldman

Review URL: https://codereview.chromium.org/47023006

git-svn-id: svn://svn.chromium.org/blink/trunk@160841 bbb929c8-8fbe-4397-9dbb-9b2b20218538