Simplify static Showability of a PreferenceItem

Co-authored-by: Janne Savolainen <janne.savolainen@live.fi>

Signed-off-by: Iku-turso <mikko.aspiala@gmail.com>

src/features/preferences/renderer/preference-items/preference-tab-root.tsx

@@ -2,8 +2,6 @@
  * Copyright (c) OpenLens Authors. All rights reserved.
  * Licensed under MIT License. See LICENSE in root directory for more information.
  */
-import type { IComputedValue } from "mobx";
-import { computed } from "mobx";
 import React from "react";
 import { HorizontalLine } from "../../../../renderer/components/horizontal-line/horizontal-line";
 import type { RootComposite } from "../../../../common/utils/composite/interfaces";
@@ -13,14 +11,14 @@ import type { Showable } from "../../../../common/utils/composable-responsibilit
 export type PreferenceTabsRoot =
   & Discriminable<"preference-tabs-root">
   & RootComposite
-  & Showable<IComputedValue<true>>
+  & Showable<true>
   & { childSeparator: () => React.ReactElement };
 
 export const preferenceTabsRoot: PreferenceTabsRoot = {
   kind: "preference-tabs-root" as const,
   id: "preference-tabs",
   parentId: undefined,
-  isShown: computed(() => true as const),
+  isShown: true as const,
 
   childSeparator: () => (
     <div style={{ padding: "0 10px" }}>