refactor: Move /target/hosts redirection into /target/index

ui/desktop/app/routes/scopes/scope/projects/targets/target.js

@@ -13,14 +13,6 @@ export default class ScopesScopeProjectsTargetsTargetRoute extends Route {
     return this.store.findRecord('target', target_id, { reload: true });
   }
 
-  /**
-   * Navigate to hostsets within a target.
-   * @param {TargetModel} model 
-   */
-  afterModel(model) {
-    this.transitionTo('scopes.scope.projects.targets.target.hosts', model);
-  }
-
   /**
    * Renders the target-specific templates for header and navigation
    * page sections.

ui/desktop/app/routes/scopes/scope/projects/targets/target/index.js

@@ -1,4 +1,13 @@
 import Route from '@ember/routing/route';
 
 export default class ScopesScopeProjectsTargetsTargetIndexRoute extends Route {
+  // =methods
+
+  /**
+   * Navigate to hosts within a target.
+   */
+  afterModel() {
+    this.transitionTo('scopes.scope.projects.targets.target.hosts');
+  }
+
 }