chore: Remove unused vct discovery domains parameter

[sandrask]

Remove unused VCT discovery domains parameter

Closes #1265

Signed-off-by: Sandra Vrtikapa sandra.vrtikapa@securekey.com

[codecov]

Codecov Report

Merging #1266 (b00b4f1) into main (412eb48) will decrease coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1266      +/-   ##
==========================================
- Coverage   87.92%   87.82%   -0.10%     
==========================================
  Files         173      174       +1     
  Lines       17397    17510     +113     
==========================================
+ Hits        15296    15379      +83     
- Misses       1338     1363      +25     
- Partials      763      768       +5     

Impacted Files	Coverage Δ
cmd/orb-server/startcmd/params.go	81.72% <ø> (-0.07%)	⬇️
cmd/orb-server/startcmd/start.go	68.07% <ø> (-0.17%)	⬇️
pkg/discovery/endpoint/restapi/operations.go	89.29% <ø> (-0.04%)	⬇️
...pub/service/inbox/httpsubscriber/httpsubscriber.go	88.88% <0.00%> (-8.89%)	⬇️
pkg/pubsub/mempubsub/mempubsub.go	95.00% <0.00%> (-1.94%)	⬇️
pkg/pubsub/amqp/amqppubsub.go	87.70% <0.00%> (-1.68%)	⬇️
cmd/orb-driver/startcmd/start.go	50.00% <0.00%> (-1.41%)	⬇️
pkg/store/publickey/publickeystore.go	90.62% <0.00%> (ø)
... and 4 more

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