fix weird start when opening vim

when opening vim on files outside of tmux, vim is in a weird state,
where the first command typed causes a delete of the current line. I
tracked the issue down to this line in the vimrc

vim/vimrc.symlink

@@ -179,9 +179,6 @@ set laststatus=2 " show the satus line all the time
 " Additional, plugin-specific mappings are located under
 " the plugins section
 
-" clear search results on escape
-nnoremap <silent> <esc> :nohlsearch<cr><esc>
-
 " Close the current buffer
 noremap <C-x> :q<cr>