Updates blink_tests/TestExpecations by removing failure expectation for
gc related tests. These tests are modified to work with ignition by
the following cls:
https://codereview.chromium.org/1972943002/
https://codereview.chromium.org/1950613005/

BUG=v8:4280,chromium:595672
LOG=N

Review-Url: https://codereview.chromium.org/1985673002
Cr-Commit-Position: refs/heads/master@{#36326}