IPOPT test bug: version checking incorrect

[mrmundt]

Fixes NA

Summary/Motivation:

I installed IPOPT 3.14 while I was refreshing my environment, and what do you know, we have a bug! We don't check the second item in this test, only the first, so this fixes it. I also removed some unused imports.

Changes proposed in this PR:

• Fix version checking bug
• Remove unused imports

Legal Acknowledgement

By contributing to this software project, I have read the contribution guide and agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.68%. Comparing base (bdb22dd) to head (38edf2c).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3862   +/-   ##
=======================================
  Coverage   89.67%   89.68%           
=======================================
  Files         908      908           
  Lines      106735   106735           
=======================================
+ Hits        95717    95722    +5     
+ Misses      11018    11013    -5     

Flag	Coverage Δ
builders	29.09% <ø> (+0.01%)	⬆️
default	85.96% <ø> (?)
expensive	35.51% <ø> (?)
linux	87.13% <ø> (-2.03%)	⬇️
linux_other	87.13% <ø> (ø)
oldsolvers	28.00% <ø> (+<0.01%)	⬆️
osx	82.04% <ø> (ø)
win	85.56% <ø> (+<0.01%)	⬆️
win_other	85.56% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.