Remove astropy version check

[ViciousEagle03]

The minimum required version of astropy is 5.2.

asdf-astropy/pyproject.toml

Line 24 in 9348f89

"astropy>=5.2.0",

This PR removes the if check for the following:

asdf-astropy/asdf_astropy/converters/transform/tests/test_transform.py

Line 81 in 9348f89

if minversion("astropy", "5.1"):

Originally discussed: #235

[ViciousEagle03]

Do I need to add a changelog entry?

[braingram]

LGTM! Once the CI goes green I'll merge this and hopefully that should allow the CI to run on your other PR.

I secretly did this so you'd clean up this code :) (just kidding)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.90%. Comparing base (e686404) to head (d63bc9a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #237      +/-   ##
==========================================
- Coverage   97.90%   97.90%   -0.01%     
==========================================
  Files          54       54              
  Lines        2055     2053       -2     
==========================================
- Hits         2012     2010       -2     
  Misses         43       43              

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