README: Remove no longer needed git submodule initialization

3 jobs for emulated-input-driver in 3 minutes and 9 seconds (queued for 1 second)
Status Job ID Name Coverage
  Prep
passed #6159979
container-prep

00:00:29

 
  Install Xserver
passed #6159980
xserver-build

00:01:55

 
  Build
passed #6159981
build

00:00:45