[cleanup] Remove unnecessary `defineComponent()` helper.

The helper was originally introduced with https://crrev.com/c/2878729 in
order to prevent accidental duplicate registrations, but that is not an
actual problem in practice. On the flip side the helper adds unnecessary
noise (both in terms of readability/familiarity and in terms of
additional pragmas to disable the relevant ESLint rule). And
additionally Open Web Component tooling[^1] doesn't understand the
helper, and cannot infer Web Component information for our code
correctly.

Given the downsides (and basically no upsides) and the fact that we are
actively exploring the idea of adopting more of open-wc, we'll drop the
helper and its eslint here.

[^1]: https://open-wc.org/guides/tools/web-component-devtools/

Doc: http://go/chrome-devtools:eslint-pain-points-design
Bug: b:319814509, chromium:1205825
Change-Id: If888be52c94d97f09662543fbf604f8dfe1eb575
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5308066
Auto-Submit: Benedikt Meurer <[email protected]>
Commit-Queue: Philip Pfaffe <[email protected]>
Reviewed-by: Philip Pfaffe <[email protected]>
diff --git a/front_end/panels/application/components/FrameDetailsView.ts b/front_end/panels/application/components/FrameDetailsView.ts
index 6bf0707..65d6bf9 100644
--- a/front_end/panels/application/components/FrameDetailsView.ts
+++ b/front_end/panels/application/components/FrameDetailsView.ts
@@ -13,7 +13,6 @@
 import * as NetworkForward from '../../../panels/network/forward/forward.js';
 import * as CspEvaluator from '../../../third_party/csp_evaluator/csp_evaluator.js';
 import * as ExpandableList from '../../../ui/components/expandable_list/expandable_list.js';
-import * as ComponentHelpers from '../../../ui/components/helpers/helpers.js';
 import * as IconButton from '../../../ui/components/icon_button/icon_button.js';
 import * as LegacyWrapper from '../../../ui/components/legacy_wrapper/legacy_wrapper.js';
 import * as Coordinator from '../../../ui/components/render_coordinator/render_coordinator.js';
@@ -869,7 +868,7 @@
   }
 }
 
-ComponentHelpers.CustomElements.defineComponent('devtools-resources-frame-details-view', FrameDetailsReportView);
+customElements.define('devtools-resources-frame-details-view', FrameDetailsReportView);
 
 declare global {
   // eslint-disable-next-line @typescript-eslint/no-unused-vars