nvim: Remove Slimux

We haven't used Slimux much and has not been as much useful in our
work flow. Also increases the load time.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.config/nvim/init.vim

@@ -84,7 +84,6 @@ Plug 'tpope/vim-sleuth'
 Plug 'tpope/vim-vinegar'
 Plug 'wellle/targets.vim'
 Plug 'Yggdroot/indentLine'
-Plug 'esamattis/slimux'
 " LC related
 Plug 'liuchengxu/vista.vim'
 Plug 'prabirshrestha/async.vim'
@@ -363,14 +362,6 @@ vnoremap <Leader># :Tabularize /#-}<CR>
 vnoremap <Leader>: :Tabularize /::<CR>
 vnoremap <Leader>[ :Tabularize /[<CR>
 
-nnoremap sL :SlimuxREPLSendLine<CR>
-vnoremap ss :SlimuxREPLSendSelection<CR>
-nnoremap sb :SlimuxREPLSendBuffer<CR>
-nnoremap sc :SlimuxREPLConfigure<CR>
-nnoremap sp :SlimuxShellPrompt<SPACE>
-nnoremap sl :SlimuxShellLast<CR>
-nnoremap se :SlimuxShellRun<SPACE>
-
 command! -bang -nargs=* GGrep
   \ call fzf#vim#grep(
   \   'git grep --line-number '.shellescape(<q-args>), 0,