Remove addVsocksHandler from loadSnapshotHandlerList

According to the firecracker OpenAPI specification [1], creating vsock
devices is only a pre-boot request, so adding vsocks after loading a
snapshot fails. It also seems redundant, since the VM loaded from a
snapshot restores vsocks anyways.

Closes firecracker-microvm#506

1. https://github.com/firecracker-microvm/firecracker/blob/56aeeac51c00b449a45be4542b3e807d34690ba7/src/api_server/swagger/firecracker.yaml#L676-L678

Signed-off-by: Georgiy Lebedev <lebedev.gk@phystech.edu>

handlers.go

@@ -321,7 +321,10 @@ var loadSnapshotHandlerList = HandlerList{}.Append(
 	CreateLogFilesHandler,
 	BootstrapLoggingHandler,
 	LoadSnapshotHandler,
-	AddVsocksHandler,
+	// According to the firecracker OpenAPI specification, creating vsock devices is only a pre-boot request, so adding
+	// vsocks after loading a snapshot fails. It also seems redundant, since the VM loaded from a snapshot restores
+	// vsocks anyways (firecracker-microvm/firecracker-go-sdk#506).
+	// AddVsocksHandler,
 )
 
 var defaultValidationHandlerList = HandlerList{}.Append(