Remove kj binding to exit Insert mode in vim

The timeout every time I ended a word with k was annoying me. So there
aren't really any words that end in j and one mapping for this is
enough.

dotfiles/.config/vim/vimrc

@@ -175,7 +175,6 @@ let $MYVIMRC="$XDG_CONFIG_HOME/vim/vimrc"
 
     " quickly exit insert mode
     inoremap jk <esc>
-    inoremap kj <esc>
 
     " retain selection when indenting/unindenting in visual mode
     vnoremap > ><cr>gv