Revert "Merge branch 'ajwalker/trace-masking' into 'master'"

What does this MR do?

Reverts MR

Why was this MR needed?

#27559 (closed)

What's the best way to test this MR?

The job:

job:
  stage: test
  script:
    - env

Should display CI_BUILD_TOKEN=[MASKED] and not CI_BUILD_TOKEN=xxxxxxx.

What are the relevant issue numbers?

#27559 (closed)