Update cheat_sheet.md

cheat_sheet.md

@@ -1,34 +1,5 @@
 # VIM Cheat Sheet
 
-## Setup
-
-Install vim-plug:
-
-```
-curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
-    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
-```
-
-clone repo and
-
-```
-ln -s /path/to/cloned/repo/.vimrc ~/.vimrc
-```
-
-then open vim and
-
-```
-:PlugInstall
-```
-
-then
-
-```
-source ~/.vimrc
-```
-
-or reopen vim
-
 ## Split
 
 - `<ctrl-w>s` or `:sp` split with line running horizontally