Revert "Provide credentials when auth is enabled"

This reverts commit 4b98d53.

Author: stevenpost

lib/puppet/provider/mongodb.rb

@@ -97,11 +97,6 @@ def self.mongosh_cmd(db, host, cmd)
       args.push('--tlsAllowInvalidHostnames') if tls_invalid_hostnames(config)
     end
 
-    if auth_enabled(config)
-      args += ['--username', 'admin']
-      args += ['--password', 'password']
-    end
-
     args += ['--eval', cmd]
     Puppet.warning('Mongosh arguments')
     Puppet.warning(args)