Delete test_video_upload_help.py
Delete test_video_upload_help.py

This test is not valuable and is flaky.

It tests a very small part of the studio feature set has been show to be flaky.

Fail: https://build.testeng.edx.org/job/edx-e2e-tests/3672/
Pass: https://build.testeng.edx.org/job/edx-e2e-tests/3673/
No change was made to stage between these.
edx/edx-e2e-tests,edx/edx-e2e-tests