chore(ui): remove unused validateRowId import in blob-inspector.js (#355)

🎯 What: Removed the unused `validateRowId` import from `core/ui/modules/blob-inspector.js`.
💡 Why: The `validateRowId` function was imported but never used in the file, representing dead code. Removing it improves codebase maintainability and readability without altering behavior.
✅ Verification: The codebase was built successfully using `bun build` and the full test suite was run and passed.
✨ Result: Cleaner code with fewer dead imports, reducing developer cognitive load.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: google-labs-jules[bot]

core/ui/modules/blob-inspector.js

@@ -2,7 +2,6 @@ import { backendApi } from './api.js';
 import { state } from './state.js';
 import { getRowDataOffset } from './data-utils.js';
 import { updateStatus } from './ui.js';
-import { validateRowId } from './utils.js';
 
 export class BlobInspector {
     constructor() {