datapath/linux/probes: remove unused (*ProbeManager).GetMisc
datapath/linux/probes: remove unused (*ProbeManager).GetMisc

After commit 27eda2c934dd ("Remove NEEDS_RELAX_VERIFIER") the method.
its corresponding member in type Features and the type Misc are no
longer used in the code.

Signed-off-by: Tobias Klauser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@cilium.io>

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