pkg/policy: remove Remove for ConsumableCache
pkg/policy: remove Remove for ConsumableCache

Function is no longer used; remove it.

Signed-off by: Ian Vernon <ian@cilium.io>

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