Fix callback show and remove hacky workaround

[efaulhaber]

Fixes the failing CI on main after JuliaSIMD/StrideArrays.jl#92 allows us to use DiffEqCallbacks version 4.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.47%. Comparing base (c744cad) to head (0ca98a6).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #669      +/-   ##
==========================================
- Coverage   68.71%   68.47%   -0.25%     
==========================================
  Files          86       87       +1     
  Lines        5299     5360      +61     
==========================================
+ Hits         3641     3670      +29     
- Misses       1658     1690      +32     

Flag	Coverage Δ
unit	68.47% <100.00%> (-0.25%)	⬇️

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.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests