hubble-proxy: remove explicit binary stripping
hubble-proxy: remove explicit binary stripping

Since commit 508fee9d557c ("make: strip symbol tables from all binaries
by default") all cilium binaries are stripped by default using Go linker
options -s and -w, unless NOSTRIP is set. Thus, don't unconditionally
strip the hubble-proxy binary but rely on the global behavior.

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

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