remove unused warning system

assets/javascripts/discourse/components/custom-wizard-step.js.es6

@@ -197,25 +197,7 @@ export default Component.extend({
         return;
       }
 
-      const step = this.step;
-      const result = step.validate();
-
-      if (result.warnings.length) {
-        const unwarned = result.warnings.filter((w) => !alreadyWarned[w]);
-        if (unwarned.length) {
-          unwarned.forEach((w) => (alreadyWarned[w] = true));
-          return window.bootbox.confirm(
-            unwarned.map((w) => I18n.t(`wizard.${w}`)).join("\n"),
-            I18n.t("no_value"),
-            I18n.t("yes_value"),
-            (confirmed) => {
-              if (confirmed) {
-                this.advance();
-              }
-            }
-          );
-        }
-      }
+      this.step.validate();
 
       if (step.get("valid")) {
         this.advance();

assets/javascripts/discourse/models/custom-wizard-field.js.es6

@@ -25,7 +25,6 @@ export default EmberObject.extend(ValidState, {
   type: null,
   value: null,
   required: null,
-  warning: null,
 
   @discourseComputed("wizardId", "stepId", "id")
   i18nKey(wizardId, stepId, id) {

assets/javascripts/discourse/models/custom-wizard-step.js.es6

@@ -35,19 +35,12 @@ export default EmberObject.extend(ValidState, {
 
   validate() {
     let allValid = true;
-    const result = { warnings: [] };
 
     this.fields.forEach((field) => {
       allValid = allValid && field.check();
-      const warning = field.get("warning");
-      if (warning) {
-        result.warnings.push(warning);
-      }
     });
 
     this.setValid(allValid);
-
-    return result;
   },
 
   fieldError(id, description) {