Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Move out azure_loadbalancer.md to cloud provider repository **What this PR does / why we need it**: Move out doc to cloud provider repository. The file 'azure_loadbalancer.md' has been moved to cloud provider repository in https://github.com/kubernetes/cloud-provider-azure/pull/23 , this PR is to remove it from upstream. **Which issue(s) this PR fixes** Fixes # **Special notes for your reviewer**: **Release note**: ```release-note NONE ``` cc @feiskyer