Remove custom expectation for inspector/profiler/heap-snapshot-summary-search-by-id.html

The flakiness was fixed in r162266

BUG=319001

Review URL: https://codereview.chromium.org/69283005

git-svn-id: svn://svn.chromium.org/blink/trunk@162303 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Delete unnecessary expectation.

Ojan, looks like the auto-rebasleine was too early.

TBR=ojan
BUG=

Review URL: https://codereview.chromium.org/73733004

git-svn-id: svn://svn.chromium.org/blink/trunk@162304 bbb929c8-8fbe-4397-9dbb-9b2b20218538