Remove duplicate base_unittests from Mac ASan 64 Tests (1)

This was added in https://codereview.chromium.org/1199813007

TBR=dpranke, maruel

BUG=98637, 503820

Review URL: https://codereview.chromium.org/1205843004.

Cr-Commit-Position: refs/heads/master@{#335902}
1 file changed