Merge pull request #31399 from yhirano55/return_nil_if_raise_http_error

Return `nil` instead of `false` if raise `Azure::Core::Http::HTTPError`

activestorage/lib/active_storage/service/azure_storage_service.rb

@@ -46,7 +46,7 @@ def delete(key)
         begin
           blobs.delete_blob(container, key)
         rescue Azure::Core::Http::HTTPError
-          false
+          # Ignore files already deleted
         end
       end
     end