[ci] remove script that was used by drone only (#14646)

[aHenryJard]

Proposed changes

• There is one remaining script.

Related issues

• closes Cleanup on CI after drone removal #14646

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.36%. Comparing base (b31f1e4) to head (5d61344).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #14647   +/-   ##
=======================================
  Coverage   32.36%   32.36%           
=======================================
  Files        3096     3096           
  Lines      210898   210898           
  Branches    38198    38198           
=======================================
  Hits        68262    68262           
  Misses     142636   142636           

Flag	Coverage Δ
opencti-client-python	45.50% <ø> (ø)
opencti-front	2.83% <ø> (ø)
opencti-graphql	67.74% <ø> (ø)

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