Remove steps for unprepared k6 after staging frontend deploy

[sarayourfriend]

Fixes

Fast follow to #4924.

Description

The linked Pr accidentally included steps in the staging deploy job that weren't validated or ready yet.

Testing Instructions

N/A, merge this to fix failing staging deploy jobs.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• [N/A] I added or updated tests for the changes I made (if applicable).
• [N/A] I added or updated documentation (if applicable).
• [N/A] I tried running the project locally and verified that there are no visible errors.
• [N/A] I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

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[dhruvkb]

Approving to enable deployment.

[krysal]

Just code removed. LGTM.

[github-actions]

Latest k6 run output¹

$     ✓ status was 200

     checks.........................: 100.00% ✓ 8000      ✗ 0   
     data_received..................: 1.8 GB  8.4 MB/s
     data_sent......................: 1.0 MB  4.9 kB/s
     http_req_blocked...............: avg=9.74µs   min=1.32µs  med=2.62µs   max=5.02ms  p(90)=3.72µs   p(95)=4.1µs   
     http_req_connecting............: avg=5.9µs    min=0s      med=0s       max=4.95ms  p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=558.99ms min=28.25ms med=500.13ms max=2.36s   p(90)=1.04s    p(95)=1.15s   
       { expected_response:true }...: avg=558.99ms min=28.25ms med=500.13ms max=2.36s   p(90)=1.04s    p(95)=1.15s   
   ✓ http_req_failed................: 0.00%   ✓ 0         ✗ 8000
     http_req_receiving.............: avg=152.51µs min=39.64µs med=112.35µs max=16.59ms p(90)=183.78µs p(95)=226.94µs
     http_req_sending...............: avg=22.63µs  min=7.51µs  med=19.98µs  max=3.4ms   p(90)=26.86µs  p(95)=32.95µs 
     http_req_tls_handshaking.......: avg=0s       min=0s      med=0s       max=0s      p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=558.82ms min=28.15ms med=499.91ms max=2.36s   p(90)=1.04s    p(95)=1.15s   
     http_reqs......................: 8000    37.025536/s
     iteration_duration.............: avg=3.73s    min=1.03s   med=3.13s    max=11.9s   p(90)=8s       p(95)=8.54s   
     iterations.....................: 1200    5.55383/s
     vus............................: 4       min=4       max=30
     vus_max........................: 30      min=30      max=30

Footnotes

1. This comment will automatically update with new output each time k6 runs for this PR ↩