Looks like parse can deal with a * namespace

ui/app/adapters/job.js

@@ -29,11 +29,8 @@ export default class JobAdapter extends WatchableNamespaceIDs {
     return this.ajax(url, 'DELETE');
   }
 
-  parse(spec, namespace = '*') {
-    const url = addToPath(
-      this.urlForFindAll('job'),
-      `/parse?namespace=${namespace}`
-    );
+  parse(spec) {
+    const url = addToPath(this.urlForFindAll('job'), `/parse?namespace=*`);
     return this.ajax(url, 'POST', {
       data: {
         JobHCL: spec,

ui/app/controllers/jobs/run.js

@@ -1,56 +1,10 @@
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
-import { computed } from '@ember/object';
-import { scheduleOnce } from '@ember/runloop';
-import { serialize } from 'nomad-ui/utils/qp-serialize';
-import { get, set } from '@ember/object';
 
 export default class RunController extends Controller {
   @service router;
-  @service system;
-  @service store;
-
-  queryParams = [
-    {
-      qpNamespace: 'namespace',
-    },
-  ];
 
   onSubmit(id, namespace) {
     this.router.transitionTo('jobs.job', `${id}@${namespace || 'default'}`);
   }
-  @computed('qpNamespace')
-  get optionsNamespaces() {
-    const availableNamespaces = this.store
-      .peekAll('namespace')
-      .map((namespace) => ({
-        key: namespace.name,
-        label: namespace.name,
-      }));
-
-    availableNamespaces.unshift({
-      key: '*',
-      label: 'All (*)',
-    });
-
-    // Unset the namespace selection if it was server-side deleted
-    if (!availableNamespaces.mapBy('key').includes(this.qpNamespace)) {
-      scheduleOnce('actions', () => {
-        // eslint-disable-next-line ember/no-side-effects
-        set(this, 'qpNamespace', '*');
-      });
-    }
-
-    return availableNamespaces;
-  }
-
-  setFacetQueryParam(queryParam, selection) {
-    this.set(queryParam, serialize(selection));
-    const model = get(this, 'model');
-    set(
-      model,
-      'namespace',
-      this.store.peekAll('namespace').find((ns) => ns.id === this.qpNamespace)
-    );
-  }
 }

ui/app/models/job.js

@@ -243,7 +243,6 @@ export default class Job extends Model {
   parse() {
     const definition = this._newDefinition;
     let promise;
-    const namespace = this.get('namespace.id');
 
     try {
       // If the definition is already JSON then it doesn't need to be parsed.
@@ -262,7 +261,7 @@ export default class Job extends Model {
 
       promise = this.store
         .adapterFor('job')
-        .parse(this._newDefinition, namespace)
+        .parse(this._newDefinition)
         .then((response) => {
           this.set('_newDefinitionJSON', response);
           this.setIdByPayload(response);

ui/app/templates/jobs/run.hbs

@@ -1,21 +1,5 @@
 <Breadcrumb @crumb={{hash label="Run" args=(array "jobs.run")}} />
 {{page-title "Run a job"}}
 <section class="section">
-  <div class="toolbar">
-    <div class="toolbar-item is-right-aligned is-mobile-full-width">
-      <div class="button-bar">
-        {{#if this.system.shouldShowNamespaces}}
-          <SingleSelectDropdown
-            data-test-namespace-facet
-            @label="Namespace"
-            @options={{this.optionsNamespaces}}
-            @selection={{this.qpNamespace}}
-            @onSelect={{action this.setFacetQueryParam "qpNamespace"}}
-          />
-        {{/if}}
-        </div>
-      </div>
-    </div>
-
   <JobEditor @job={{this.model}} @context="new" @onSubmit={{action this.onSubmit}} />
 </section>