bpf: remove write-only bool backend_from_affinity from lb{4,6}local
bpf: remove write-only bool backend_from_affinity from lb{4,6}local

The bool backend_from_affinity is only set but never read in both
lb4_local and lb6_local since commit 71b62436a532 ("bpf: remove stale
backend affinity deletion from hot-path"). Remove the variable from both
functions.

Signed-off-by: Tobias Klauser <9249c549618448e4c699e8032ba6c7f0d7fd4b7f@distanz.ch>

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