pkg/ip: Assign value to allowedCIDRs variable only if it's used
pkg/ip: Assign value to allowedCIDRs variable only if it's used

The first value returned by RemoveCIDRs is not always used and
it can be skipped once.

Signed-off-by: Michal Rostecki <82ebf970c69340aebb770c3853be5fd96a3eb584@suse.com>

scanf/cilium,scanf/cilium,michi-covalent/cilium,scanf/cilium,tklauser/cilium,eloycoto/cilium,cilium/cilium,tklauser/cilium,scanf/cilium,eloycoto/cilium,eloycoto/cilium,cilium-team/cilium,michi-covalent/cilium,scanf/cilium,scanf/cilium,cilium/cilium,tgraf/cilium,tgraf/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,eloycoto/cilium,michi-covalent/cilium,tgraf/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,tgraf/cilium,eloycoto/cilium,tgraf/cilium,eloycoto/cilium,cilium/cilium,cilium-team/cilium,eloycoto/cilium,tgraf/cilium,michi-covalent/cilium,scanf/cilium