docker: Remove ARM64 build step from Docker manifest workflow

Eliminated the ARM64 build step and adjusted the Docker manifest creation to only reference the AMD64 digest. This simplifies the workflow and focuses on the primary architecture.

Signed-off-by: Chiho Sin <[email protected]>

Author: chihosin

.github/workflows/docker_manifest.yml

@@ -27,20 +27,9 @@ jobs:
       push: true
     secrets: inherit
 
-  docker-arm64:
-    if: ${{ inputs.cpy_platform != 'litex' }}
-    uses: ./.github/workflows/docker_build.yml
-    with:
-      cpy_platform: ${{ inputs.cpy_platform }}
-      platform: linux/arm64
-      runs-on: ubuntu-24.04-arm
-      push: true
-    secrets: inherit
-
   docker-manifest:
     needs:
       - docker-amd64
-      - docker-arm64
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
@@ -61,23 +50,12 @@ jobs:
             main-${{ inputs.cpy_platform }}
           flavor: latest=false
 
-      - name: Create Docker manifest AMD64
-        id: manifest_docker_amd64
-        uses: int128/docker-manifest-create-action@v2
-        with:
-          tags: |
-            ${{ steps.meta_docker.outputs.tags }}
-          push: true
-          sources: |
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ needs.docker-amd64.outputs.digest }}
-
-      - name: Create Docker manifest ARM64
-        if: ${{ inputs.cpy_platform != 'litex' }}
-        id: manifest_docker_arm64
+      - name: Create Docker manifest
+        id: manifest_docker
         uses: int128/docker-manifest-create-action@v2
         with:
           tags: |
             ${{ steps.meta_docker.outputs.tags }}
           push: true
           sources: |
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ needs.docker-arm64.outputs.digest }}
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ needs.docker-amd64.outputs.digest }}