chore: delete unused code (appsmithorg#36461)

## Description
The second round of deleting unused files, `.ts` were added to the
check.

[Related EE PR](appsmithorg/appsmith-ee#5205)

## Automation

/ok-to-test tags="@tag.All"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10991435044>
> Commit: 7cfbcb9
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10991435044&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.All`
> Spec:
> <hr>Mon, 23 Sep 2024 10:51:02 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Expanded project file scope to include JavaScript files alongside
TypeScript files.
- **Bug Fixes**
- Removed obsolete functions and constants related to help, tour, and
API functionalities, improving overall code clarity and maintenance.
- **Chores**
- Deleted several unused files and constants across various components,
enhancing project organization and reducing clutter.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/knip.json

@@ -1,6 +1,6 @@
 {
   "entry": ["src/index.tsx"],
-  "project": ["src/**/*.tsx"],
+  "project": ["src/**/*.{tsx,ts,js}"],
   "ignore": [
     "packages/**/stories/**",
     "packages/**/chromatic/**",
@@ -9,6 +9,16 @@
     "packages/rts/build.js",
     "packages/design-system/ads/src/Documentation/**",
     "src/components/designSystems/blueprintjs/**",
-    "packages/design-system/ads/plopfile.mjs"
+    "packages/design-system/ads/plopfile.mjs",
+    "src/plugins/Linting/**",
+    "src/ee/plugins/Linting/**",
+    "src/ce/plugins/Linting/**",
+    "src/workers/Evaluation/**",
+    "src/widgets/ExternalWidget/component/script.js",
+    "src/widgets/ListWidgetV2/widget/derived.js",
+    "src/workers/Tern/tern.worker.ts",
+    "src/widgets/CustomWidget/component/appsmithConsole.js",
+    "src/serviceWorker.ts",
+    "src/ee/utils/serviceWorkerUtils.ts"
   ]
 }