domains: remove locked field

we will do this as part of access control if needed later

src/domaindb.js

@@ -16,7 +16,7 @@ var assert = require('assert'),
     database = require('./database.js'),
     safe = require('safetydance');
 
-var DOMAINS_FIELDS = [ 'domain', 'zoneName', 'provider', 'configJson', 'tlsConfigJson', 'locked' ].join(',');
+var DOMAINS_FIELDS = [ 'domain', 'zoneName', 'provider', 'configJson', 'tlsConfigJson' ].join(',');
 
 function postProcess(data) {
     data.config = safe.JSON.parse(data.configJson);
@@ -24,8 +24,6 @@ function postProcess(data) {
     delete data.configJson;
     delete data.tlsConfigJson;
 
-    data.locked = !!data.locked; // make it bool
-
     return data;
 }