fix: ManageForeignRoutes is not needed anymore

https://github.com/cilium/cilium/pull/27208/

bootstrap/templates/ansible/playbooks/cluster-prepare.yaml.j2

@@ -61,17 +61,6 @@
               ff02::2 ip6-allrouters
             dest: /etc/hosts
             mode: preserve
-        # https://github.com/cilium/cilium/issues/18706
-        - name: Network Configuration | Cilium (1)
-          ansible.builtin.lineinfile:
-            dest: /etc/systemd/networkd.conf
-            regexp: ManageForeignRoutingPolicyRules
-            line: ManageForeignRoutingPolicyRules=no
-        - name: Network Configuration | Cilium (2)
-          ansible.builtin.lineinfile:
-            dest: /etc/systemd/networkd.conf
-            regexp: ManageForeignRoutes
-            line: ManageForeignRoutes=no
         # https://github.com/onedr0p/flux-cluster-template/discussions/635
         - name: Network Configuration | Remove immutable flag from /etc/resolv.conf
           ansible.builtin.file: