diff --git a/Vagrantfile b/Vagrantfile
index b4b2c441c3..bca112395e 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -115,12 +115,6 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
 
   config.vm.provider "virtualbox" do |vb, override|
     override.vm.box = "hashicorp/bionic64"
-    # An unnecessary log file gets generated when running vagrant up for the
-    # first time with the Ubuntu Bionic box. This looks like it is being
-    # caused upstream by the base box containing a Vagrantfile with a similar
-    # line to the one below.
-    # see https://github.com/hashicorp/vagrant/issues/9425
-    vb.customize [ "modifyvm", :id, "--uartmode1", "disconnected" ]
     # It's possible we can get away with just 1.5GB; more testing needed
     vb.memory = vm_memory
     vb.cpus = vm_num_cpus