fix: Remove duplicate i18n, en key: qr_hardware (#9051)

## **Description**

Removes duplicate en, i18n key: `qr_hardware`

## **Related issues**

Fixes:

## **Manual testing steps**


## **Screenshots/Recordings**

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before and after of your change. -->

### **Before**

<img width="464" alt="Screenshot 2024-03-25 at 3 15 43 PM"
src="https://github.com/MetaMask/metamask-mobile/assets/20778143/293e9832-4327-4bdf-838f-497f384a33d2">

### **After**

<!-- [screenshots/recordings] -->

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Author: digiwand

locales/languages/en.json

@@ -541,7 +541,6 @@
   },
   "accounts": {
     "create_new_account": "Create a new account",
-    "qr_hardware": "QR hardware",
     "import_account": "Import an account",
     "connect_hardware": "Connect hardware wallet",
     "imported": "Imported",