moved to repo root out of docs

Author: alirana01

docs/src/MAINTENANCE.md MAINTENANCE.mddocs/src/MAINTENANCE.md renamed to MAINTENANCE.md

@@ -17,4 +17,3 @@
 - [Report issue](./issue_reporting.md)
 - [Headless Usage](./headless_usage.md)
 - [FAQ](./faq.md)
-- [Maintenance Guide](./MAINTENANCE.md)