Revert "Clientset for seldon operator"

[ryandawsonuk]

Reverts #1221

We're now seeing below in the build

Error: not all generators ran successfully
run `controller-gen object:headerFile=./hack/boilerplate.go.txt paths=./... -w` to see all available markers, or `controller-gen object:headerFile=./hack/boilerplate.go.txt paths=./... -h` for usage

[seldondev]

Wed Dec 11 12:12:52 UTC 2019
The logs for [pr-build] [1] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1240/1.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1240 --build=1

[seldondev]

Wed Dec 11 12:13:04 UTC 2019
The logs for [lint] [2] will show after the pipeline context has finished.
https://github.com/SeldonIO/seldon-core/blob/gh-pages/jenkins-x/logs/SeldonIO/seldon-core/PR-1240/2.log

impatient try
jx get build logs SeldonIO/seldon-core/PR-1240 --build=2

[adriangonz]

/approve

Looks good to me!

[seldondev]

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