check links and update .nav.yml to remove add-pallet-to-runtime page

Author: eshaben

…o-runtime/add-pallets-to-runtime-01.webp …add-existing-pallets/add-pallets-01.webpimages/parachains/customize-runtime/pallet-development/add-pallet-to-runtime/add-pallets-to-runtime-01.webp renamed to images/parachains/customize-runtime/add-existing-pallets/add-pallets-01.webp images/parachains/customize-runtime/pallet-development/add-pallet-to-runtime/add-pallets-to-runtime-01.webp renamed to images/parachains/customize-runtime/add-existing-pallets/add-pallets-01.webp

@@ -259,7 +259,7 @@ To interact with the pallet:
     - **`batchAll(calls)`**: Dispatch multiple calls, stopping on the first error.
     - **`asDerivative(index, call)`**: Dispatch a call as a derivative account.
 
-    ![](/images/parachains/customize-runtime/pallet-development/add-pallet-to-runtime/add-pallets-to-runtime-01.webp)
+    ![](/images/parachains/customize-runtime/add-existing-pallets/add-pallets-01.webp)
 
 You can now test the pallet's functionality by submitting transactions through the interface.
 

images/parachains/customize-runtime/pallet-development/add-pallet-to-runtime/add-pallets-to-runtime-02.webp

@@ -2,5 +2,4 @@ nav:
  - 'Create a Custom Pallet': create-a-pallet.md
  - 'Mock Your Runtime': mock-runtime.md
  - 'Pallet Unit Testing': pallet-testing.md
- - 'Add a Custom Pallet to Your Runtime': add-pallet-to-runtime.md
  - 'Benchmark a Custom Pallet': benchmark-pallet.md

parachains/customize-runtime/add-existing-pallets.md

@@ -48,7 +48,6 @@ Deep dive into creating and managing custom pallets for your parachain.
 |           [Create a Custom Pallet](/parachains/customize-runtime/pallet-development/create-a-pallet/)            |       Build a pallet from scratch with custom logic       |
 |               [Mock Your Runtime](/parachains/customize-runtime/pallet-development/mock-runtime/)                |       Set up a mock runtime environment for testing       |
 |             [Pallet Unit Testing](/parachains/customize-runtime/pallet-development/pallet-testing/)              |      Write comprehensive tests for your pallet logic      |
-| [Add Your Custom Pallet to the Runtime](/parachains/customize-runtime/pallet-development/add-pallet-to-runtime/) | Integrate your custom pallet into your parachain runtime  |
 |        [Benchmark the Custom Pallet](/parachains/customize-runtime/pallet-development/benchmark-pallet/)         | Measure and optimize pallet performance with benchmarking |
 
 ## Testing