Remove unused, add maprules documentation

modules/core/context.js

@@ -480,15 +480,14 @@ export function coreContext() {
     features = rendererFeatures(context);
     presets = presetIndex();
 
-    if (services.maprules && utilStringQs(window.location.hash).validations) {
-        var validations = utilStringQs(window.location.hash).validations;
-        d3_json(validations, function (err, mapcss) {
+    if (services.maprules && utilStringQs(window.location.hash).maprules) {
+        var maprules = utilStringQs(window.location.hash).maprules;
+        d3_json(maprules, function (err, mapcss) {
             if (err) return;
             services.maprules.init(context.presets().areaKeys());
             _each(mapcss, function(mapcssSelector) {
                 return services.maprules.addRule(mapcssSelector);
             });
-            context.validationRules = true;
         });
     }
 

modules/util/index.js

@@ -9,8 +9,6 @@ export { utilEditDistance } from './util';
 export { utilEntitySelector } from './util';
 export { utilEntityOrMemberSelector } from './util';
 export { utilEntityOrDeepMemberSelector } from './util';
-export { utilExternalPresets } from './util';
-export { utilExternalValidationRules } from './util';
 export { utilFastMouse } from './util';
 export { utilFunctor } from './util';
 export { utilGetAllNodes } from './util';

modules/util/util.js

@@ -311,13 +311,6 @@ export function utilNoAuto(selection) {
         .attr('spellcheck', isText ? 'true' : 'false');
 }
 
-export function utilExternalPresets() {
-    return utilStringQs(window.location.hash).hasOwnProperty('presets');
-}
-
-export function utilExternalValidationRules() {
-    return utilStringQs(window.location.hash).hasOwnProperty('validations');
-}
 
 // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
 // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/