cubicweb #2919297 drop zmq-pickle [validation pending]

This pickle over zmq option have no real benefit over what pyro can already do.We are moving in the direction to drop such kind of pickled RPC.

prioritynormal
typeenhancement
done in3.21.0
load0.200
load left0.000
closed by#ef3059a692cb Remove the remote repository-access-through-zmq support
patchRemove leftover bits from start-repository command, and document its demise [applied]Remove the remote repository-access-through-zmq support [folded]Remove the remote repository-access-through-zmq support [applied]