fix: remove misleading 'Restore Complete' step in csharp-publish

Remove the 'Restore Complete' step that always printed 'Cache hit -
skipping dotnet restore' even though restore always runs via the retry
action.

The message was misleading because:
- Dependencies are always restored via step-security/retry
- The message claimed restore was skipped, which was false
- The step served no actual purpose

The 'Restore Dependencies' step already provides appropriate output
during execution, making this step redundant and confusing.

csharp-publish/action.yml

@@ -177,11 +177,6 @@ runs:
           echo "Restoring .NET dependencies..."
           dotnet restore --verbosity normal
 
-    - name: Restore Complete
-      shell: bash
-      run: |
-        echo "Cache hit - skipping dotnet restore"
-
     - name: Build Solution
       shell: bash
       run: |