Cleanup: kubeadm-config v1beta4 extra args defined conditions (#12307)

* Cleanup: kubeadm-config v1beta4 extra args defined conditions

Some variables have already been defined, so there is no need to
useconditional statements to check whether they have been defined.

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

* Cleanup: cloud-provider extra args

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>

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Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>