Dockerfile cleanup: remove unused args

[jotak]

same as netobserv/network-observability-operator#769 , with some extra cleaning

[openshift-ci]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.28%. Comparing base (f8abad2) to head (a0f65b4).
Report is 1 commits behind head on main.

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HEAD has 1 upload less than BASE

Flag	BASE (f8abad2)	HEAD (a0f65b4)
uitests	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #596      +/-   ##
==========================================
- Coverage   55.35%   50.28%   -5.07%     
==========================================
  Files         193       37     -156     
  Lines       10098     3130    -6968     
  Branches     1218        0    -1218     
==========================================
- Hits         5590     1574    -4016     
+ Misses       4131     1392    -2739     
+ Partials      377      164     -213     

Flag	Coverage Δ
uitests	?
unittests	50.28% <ø> (ø)

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see 156 files with indirect coverage changes

[jotak]

@OlivierCazade I rebased this PR, you already fixed the initial problem but this is still doing a bit a cleanup (removing unused arguments)