refactor: remove unnecessary conditional
refactor: remove unnecessary conditional

we always have a flowWalker when not using ebpf

alban/scope,weaveworks/scope,alban/scope,alban/scope,kinvolk/scope,alban/scope,kinvolk/scope,weaveworks/scope,alban/scope,weaveworks/scope,weaveworks/scope,kinvolk/scope,kinvolk/scope,weaveworks/scope,weaveworks/scope,kinvolk/scope,alban/scope,kinvolk/scope