MAINT: remove dace module

[bsipocz]

The module was non-functioning due to server changes. A

After some coordination with the DACE team we opted for its removal from astroquery in favour of the dace-query package that they maintain. We are all open for adding back the module to astroquery if/when there is some support for it from the archive or from the community.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 67.49%. Comparing base (ad2e207) to head (fbf55b0).
Report is 22 commits behind head on main.

Files with missing lines	Patch %	Lines
astroquery/dace/__init__.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3162      +/-   ##
==========================================
- Coverage   67.54%   67.49%   -0.06%     
==========================================
  Files         233      232       -1     
  Lines       18493    18446      -47     
==========================================
- Hits        12491    12450      -41     
+ Misses       6002     5996       -6     

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