MNT: Do not write config on import

[pllim]

This functionality will be deprecated in astropy in a future release. See astropy/astropy#11497 and https://groups.google.com/g/astropy-dev/c/KVzPgeihxO8

cc @saimn

[codecov]

Codecov Report

Merging #261 (efc3571) into master (519ea28) will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #261      +/-   ##
==========================================
+ Coverage   74.89%   74.98%   +0.08%     
==========================================
  Files          44       44              
  Lines        5075     5057      -18     
==========================================
- Hits         3801     3792       -9     
+ Misses       1274     1265       -9     

Impacted Files	Coverage Δ
pyvo/_astropy_init.py	100.00% <ø> (+26.47%)	⬆️

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[andamian]

Thank you, @pllim !