build-support/vm: don't depend on the "unix" module (#375355)

Author: K900

pkgs/build-support/vm/default.nix

@@ -5,7 +5,7 @@
 , img ? pkgs.stdenv.hostPlatform.linux-kernel.target
 , storeDir ? builtins.storeDir
 , rootModules ?
-    [ "virtio_pci" "virtio_mmio" "virtio_blk" "virtio_balloon" "virtio_rng" "ext4" "unix" "virtiofs" "crc32c_generic" ]
+    [ "virtio_pci" "virtio_mmio" "virtio_blk" "virtio_balloon" "virtio_rng" "ext4" "virtiofs" "crc32c_generic" ]
 }:
 
 let