Remove copy-asset-links command

[rfontanarosa]

Towards #2304

it works: https://ground-dev-sig.web.app/.well-known/assetlinks.json

[gino-m]

Approved with one nit.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.96%. Comparing base (f6198f2) to head (d6971fa).
⚠️ Report is 979 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2330      +/-   ##
==========================================
- Coverage   56.56%   53.96%   -2.60%     
==========================================
  Files          66      115      +49     
  Lines        1844     2863    +1019     
  Branches      254      418     +164     
==========================================
+ Hits         1043     1545     +502     
- Misses        734     1274     +540     
+ Partials       67       44      -23     

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