ADR for Sysadmin Dashboard deprecation and removal

lms/djangoapps/dashboard/decisions/0002-deprecate-sysadmin-dashboard-adr.rst

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+2. Deprecating the Sysadmin Dashboard
+---------------------
+
+Status
+------
+
+Draft
+
+Context
+-------
+
+Maintaining the sysadmin dashboard is challenging, and it is not widely used. The code is part of the lms
+application, even though most of its use cases are relevant to course authoring.
+
+The sysadmin dashboard would be better suited as a pluggable django application, using appropriate APIs in the
+cms application
+
+Decision
+--------
+
+In order to deprecate the sysadmin dashboard and move it to a pluggable django application, the followings APIs
+would need to be added and/or moved into the cms application
+
+1. Create a cms user account
+
+   https://github.com/edx/edx-platform/blob/50dd1238408dc6785f022d8540961f96e0d6bb4f/lms/djangoapps/dashboard/sysadmin.py#L113-L151
+
+2. Import a course from git
+
+   https://github.com/edx/edx-platform/blob/master/lms/djangoapps/dashboard/git_import.py
+
+3. Delete a course
+
+   https://github.com/edx/edx-platform/blob/master/lms/djangoapps/dashboard/sysadmin.py#L383-L408
+
+
+These APIs can be removed entirely, as they are adequately covered by existing functionality:
+
+1. Delete a cms user.
+
+   This functionality should be removed entirely. CMS user accounts should be retired using the existing `edX User
+   Retirement Feature <https://edx.readthedocs.io/projects/edx-installing-configuring-and-running/en/latest/configuration/user_retire/>`_.
+
+2. Staffing and Enrollment
+
+   https://github.com/edx/edx-platform/blob/master/lms/djangoapps/dashboard/sysadmin.py#L419-L477
+
+   This functionality may be redundant to features in the Insights application.
+
+