message: test-support: Remove unnecessary `event-isolated` argument
diff: @@ -77,10 +77,10 @@ When using the above code make sure to use the \`setupCardTest(hooks)\` test hel
  context.set('widthStyle', htmlSafe(`width: ${options.width}`));
  return render(hbs`
  <div style="{{widthStyle}}">
  - {{cardstack-content event-isolated content=card format=format params=params }}
  + {{cardstack-content content=card format=format params=params }}
  </div>`);
  } else {
  - return render(hbs`{{cardstack-content event-isolated content=card format=format params=params }}`);
  + return render(hbs`{{cardstack-content content=card format=format params=params }}`);
  }
  });
  }
  @@ -129,6 +129,6 @@ export function setupCardTestComponent(hooks) {
  this.owner.register('component:cardstack-card-test', CardTestComponent);
  this.owner.register('template:components/cardstack-card-test',
  - hbs`{{#if card}}{{cardstack-content event-isolated content=card format=format params=params}}{{/if}}`);
  + hbs`{{#if card}}{{cardstack-content content=card format=format params=params}}{{/if}}`);
  });
  }
  