bpf: Remove unused ENABLE_L7_PROXY macro
bpf: Remove unused ENABLE_L7_PROXY macro

This macro isn't used anywhere in the BPF codebase so it's safe to
remove.

Reverts: 4189d1c74 ("vtep: add ENABLE_L7_PROXY to check in datapath")
Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium