Remove Vim setup from GitLab install instructions

doc/install/installation.md

@@ -102,16 +102,6 @@ apt-get upgrade -y
 apt-get install sudo -y
 ```
 
-During this installation, some files need to be edited manually. If you are familiar
-with vim, set it as default editor with the commands below. If you are not familiar
-with vim, skip this and keep using the default editor:
-
-```shell
-# Install vim and set as default editor
-sudo apt-get install -y vim
-sudo update-alternatives --set editor /usr/bin/vim.basic
-```
-
 ### Build dependencies
 
 Install the required packages (needed to compile Ruby and native extensions to Ruby gems):