rust/sip: delete redundant computing codes

[liheng562653799]

Ticket: 8003

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Link to ticket: https://redmine.openinfosecfoundation.org/issues/8003

Describe changes:

• In parser.rs, when is_token_char and is_alphanumeric are called together, is_alphanumeric is deleted.
• Four lines are modified.

Provide values to any of the below to override the defaults.

• To use a Suricata-Verify or Suricata-Update pull request,
  link to the pull request in the respective _BRANCH variable.
• Leave unused overrides blank or remove.

SV_REPO=
SV_BRANCH=
SU_REPO=
SU_BRANCH=

[github-actions]

NOTE: This PR may contain new authors.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.46%. Comparing base (0990c9d) to head (202fa6a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14096      +/-   ##
==========================================
- Coverage   84.46%   84.46%   -0.01%     
==========================================
  Files        1013     1013              
  Lines      271932   271932              
==========================================
- Hits       229694   229693       -1     
- Misses      42238    42239       +1     

Flag	Coverage Δ
fuzzcorpus	63.41% <100.00%> (+<0.01%)	⬆️
livemode	19.42% <0.00%> (+<0.01%)	⬆️
pcap	44.85% <100.00%> (+0.01%)	⬆️
suricata-verify	65.27% <100.00%> (-0.01%)	⬇️
unittests	59.46% <100.00%> (+<0.01%)	⬆️

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[liheng562653799]

What should I do next, I can't do re-run and I can't find where the problem is.

[jufajardini]

Maybe I'm being too strict, but I would prefer if the commit message had a simple explanation of where the redundancy is.

[liheng562653799]

Maybe I'm being too strict, but I would prefer if the commit message had a simple explanation of where the redundancy is.

It's goot having clear annotations, I have add some explanation.

[inashivb]

Thank you for your first contribution to Suricata! Please address Juliana's comments, clean the git history and submit a new PR as per our contribution guidelines linked above.