configure: Remove obsolete rust support line-v2

[Nancyenos]

Ticket: #6705

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• I have read the contributing guide lines at
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Link to ticket: https://redmine.openinfosecfoundation.org/issues/6705

Describe changes:

• Remove obsolete rust support line
  -previous pr draft: Build-info: remove obsolete rust support line-v1 #12038

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.41%. Comparing base (89aa525) to head (1f337e7).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #12040      +/-   ##
==========================================
- Coverage   83.42%   83.41%   -0.02%     
==========================================
  Files         910      910              
  Lines      257642   257642              
==========================================
- Hits       214934   214906      -28     
- Misses      42708    42736      +28     

Flag	Coverage Δ
fuzzcorpus	61.58% <ø> (+0.01%)	⬆️
livemode	19.41% <ø> (-0.01%)	⬇️
pcap	44.47% <ø> (-0.03%)	⬇️
suricata-verify	62.77% <ø> (+<0.01%)	⬆️
unittests	59.37% <ø> (ø)

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