Conversation OperationService::UserDeleteBranch

**Stages**:

- [x] ~"RPC Design": https://gitlab.com/gitlab-org/gitaly/issues/602 https://gitlab.com/gitlab-org/gitaly-proto/merge_requests/82 https://gitlab.com/gitlab-org/gitaly-proto/merge_requests/87

- [x] ~"Server Implementation": https://gitlab.com/gitlab-org/gitaly/issues/603 https://gitlab.com/gitlab-org/gitaly/merge_requests/377

- [ ] ~"Client Implementation": https://gitlab.com/gitlab-org/gitaly/issues/611 https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14603

- [ ] ~"Acceptance Testing": [Create Issue](https://gitlab.com/gitlab-org/gitaly/issues/new?issuable_template=Migration_Acceptance_Testing)

**RPC Endpoints**:
  - `RepositoryService::UserDeleteBranch`

**Known Client Routes**:
  - https://gitlab.com/gitlab-org/gitaly/branches
  
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Gitlab::Git::Repository#rm_branch

Compare with https://gitlab.com/gitlab-org/gitaly/issues/540 for RPC design.

removed assignee

assigned to @eReGeBe

mentioned in issue #602 (closed)

mentioned in issue #603 (closed)

changed the description

changed the description

changed the description

marked the checklist item RPC Design: https://gitlab.com/gitlab-org/gitaly/issues/602 https://gitlab.com/gitlab-org/gitaly-proto/merge_requests/82 as completed

added Migration:Server-Impl and removed Migration:Ready-for-Development To Do labels

mentioned in issue #611 (closed)

changed title from Conversation RepositoryService::UserDeleteBranch to Conversation OperationService::UserDeleteBranch

changed the description

added OKR:2017Q3:In-Progress label

added OKR:2017Q3 label

mentioned in merge request gitaly-proto!87 (merged)

changed the description

marked the checklist item Server Implementation: https://gitlab.com/gitlab-org/gitaly/issues/603 https://gitlab.com/gitlab-org/gitaly/merge_requests/377 as completed

changed the description

mentioned in merge request gitlab-foss!14785