Removes Mikolaj from Polarios codeowner

Author: frenzyfriday

.github/CODEOWNERS

@@ -30,7 +30,7 @@ roles/ci_gen_kustomize_values/templates/ovs-dpdk-sriov-2nodesets @openstack-k8s-
 roles/ci_gen_kustomize_values/templates/sriov @openstack-k8s-operators/nfv
 
 # Polarion
-roles/polarion @tosky @ciecierski @jparoly @jirimacku
+roles/polarion @tosky @jparoly @jirimacku
 
 # Report portal
 roles/reportportal @jirimacku @dsariel @sdatko