Enable per pod PID namespace setting

If the pid namespace mode is set to POD, then the container's namespace
should be set to the namespace of the pod infra container.

Signed-off-by: umohnani8 <umohnani@redhat.com>

lib/config.go

@@ -121,9 +121,6 @@ type RuntimeConfig struct {
 	// NoPivot instructs the runtime to not use `pivot_root`, but instead use `MS_MOVE`
 	NoPivot bool `toml:"no_pivot"`
 
-	// EnableSharePidNamespace instructs the runtime to enable share pid namespace
-	EnableSharedPIDNamespace bool `toml:"enable_shared_pid_namespace"`
-
 	// Conmon is the path to conmon binary, used for managing the runtime.
 	Conmon string `toml:"conmon"`