fix: dropped deprecated critterbase signup

[MacQSL]

Links to Jira Tickets

• Citterbase User Auth PR

Description of Changes

• Drops deprecated Critterbase /signUp request related code

Testing Notes

• {List any relevant testing considerations, necessary pre-reqs, and areas of the app to focus on. Specifically, include anything that will help the reviewers of this PR verify the code is functioning as expected.}

[github-actions]

Openshift URLs for the PR Deployment:

• App Route: https://biohubbc-app-1373-af2668-dev.apps.silver.devops.gov.bc.ca/
• Api Route: https://biohubbc-api-1373-af2668-dev.apps.silver.devops.gov.bc.ca/
• Pods: https://console.apps.silver.devops.gov.bc.ca/k8s/ns/af2668-dev/pods?name=1373

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.50%. Comparing base (430d007) to head (b1b425e).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1373      +/-   ##
==========================================
+ Coverage   48.48%   48.50%   +0.01%     
==========================================
  Files         772      770       -2     
  Lines       20728    20709      -19     
  Branches     3131     3128       -3     
==========================================
- Hits        10051    10045       -6     
+ Misses      10531    10518      -13     
  Partials      146      146              

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[NickPhura]

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