update golangci.yml

The deadline option was renamed to timeout and I see 1m timeouts in CI
so I think the option isn't working there.
Also remove the core limit, by default it uses all cores and there is no
reason to limit that really.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

common/.golangci.yml

@@ -9,8 +9,7 @@ run:
     - exclude_graphdriver_devicemapper
     - containers_image_openpgp
     - cni
-  concurrency: 6
-  deadline: 5m
+  timeout: 5m
 linters:
   enable-all: true
   disable: