Also removes the angle_end2end_tests feature override.

Bug: angleproject:4029
Change-Id: I0d0bd087fc2143360185592d9fa1238a9bafc55d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2046054
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>