Remove unit types commits and settings (#2161)

* Remove unit types commits and settings

* Can not limit units in administrator teams

* Limit changing units only to teams with read and write access mode

* Small code optimization

models/migrations/migrations.go

@@ -124,6 +124,8 @@ var migrations = []Migration{
 	NewMigration("regenerate git hooks", regenerateGitHooks36),
 	// v37 -> v38
 	NewMigration("unescape user full names", unescapeUserFullNames),
+	// v38 -> v39
+	NewMigration("remove commits and settings unit types", removeCommitsUnitType),
 }
 
 // Migrate database to current version