refactor(item): remove build conditional for test environment (#29007)

- Fix Internal issue (FW-5205) - Removed the build conditional in the
`item` component since the previous issue is already fixed in Stencil.

---------

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## What is the current behavior?
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- No changes were made in terms of behavior.

## What is the new behavior?
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- No changes were made in terms of behavior so it will work as before.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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screenshots of how the component looks before and after the change. -->

- Spec tests still pass even after this change (we can see below the
results before and after the change)
- Ran the command `npm run test.spec
src/components/item/test/item.spec.ts
src/components/item/test/item.spec.tsx`
    

![image](https://github.com/ionic-team/ionic-framework/assets/29493222/54a5f41c-d2c1-46e5-a220-2b881d5bd318)

Author: gnbm

core/src/components/item/item.tsx

@@ -1,5 +1,5 @@
 import type { ComponentInterface } from '@stencil/core';
-import { Build, Component, Element, Host, Listen, Prop, State, Watch, forceUpdate, h } from '@stencil/core';
+import { Component, Element, Host, Listen, Prop, State, Watch, forceUpdate, h } from '@stencil/core';
 import type { AnchorInterface, ButtonInterface } from '@utils/element-interface';
 import type { Attributes } from '@utils/helpers';
 import { inheritAttributes, raf } from '@utils/helpers';
@@ -358,15 +358,6 @@ export class Item implements ComponentInterface, AnchorInterface, ButtonInterfac
   }
 
   private getFirstInteractive() {
-    if (Build.isTesting) {
-      /**
-       * Pseudo selectors can't be tested in unit tests.
-       * It will cause an error when running the tests.
-       *
-       * TODO: FW-5205 - Remove the build conditional when this is fixed in Stencil
-       */
-      return undefined;
-    }
     const controls = this.el.querySelectorAll<HTMLElement>(
       'ion-toggle:not([disabled]), ion-checkbox:not([disabled]), ion-radio:not([disabled]), ion-select:not([disabled])'
     );