Remove cmd

development.rst

@@ -33,4 +33,6 @@ Here is a list of exit codes and what they mean:
 | 20        | Requested package set is not available   | Use 'available' command to see list of available package_sets                    |
 | 30        | Current directory is already initialised | Check if you are in the  right directory                                         |
 | 40        | Current directory is not initialised     | Check if you are in the  right directory, if so use 'init' command to initialise |
+| 50        | No package set is selected               | Please specify package_sets to remove, or 'ALL' to remove all package_sets       |
+| 60        | User didnt confirm removing the release  | Please input 'y' if you are sure about removing the entire release               |
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