datapath/connector: remove unused funcs
datapath/connector: remove unused funcs

The last remaining user of DeriveEndpointFrom was removed by commit
532ad9d44a6f ("rm pkg/workloads"). GetNetInfoFromPID and GetVethInfo
were only used by DeriveEndpointFrom, so remove them as well.

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

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