This Redmine plugin allows you to hide specific "versions" from reports and menus.

More info from Redmine here

1. Download this plugin
2. Move it into your Redmine installation's plugins directory: <redmine-install-dir>/htdocs/plugins
3. Run the small migration: rake redmine:plugins:migrate RAILS_ENV=production
4. Restart Redmine

You should now be able to see the plugin list in Administration -> Plugins.

1. Login to Redmine using an administrator account.
2. Go to the settings page of a project.
3. Choose the "Versions" tab.
4. Edit a particular version.
5. Use the checkbox "Hidden" to show or hide that version.

1. Remove the small migration: rake redmine:plugins:migrate NAME=redmine_hide_versions VERSION=0 RAILS_ENV=production
2. Remove the plugin code: rm -r <redmine-install-dir>/htdocs/plugins/redmine_hide_versions
3. Restart Redmine

The plugin should now be gone from the plugin list in Administration -> Plugins.