nvim: keymappings: Drop enhanced ijump helper

This actually crashes in some situations. Drop this.

nvim/.config/nvim/keymappings.vim

@@ -119,17 +119,3 @@ vnoremap N Nzz
 vnoremap . :norm.<CR>
 " Go to the last file we changed
 nnoremap <BS> <C-^>
-
-nnoremap [i [I:call <SID>PromptAndExec(":ijump! %d \022\027\015")<CR>
-nnoremap ]i ]I:call <SID>PromptAndExec(":+1,$ijump! %d \022\027\015")<CR>
-
-function! s:PromptAndExec(cmd) abort
-  let ans = input('Type number and <Enter> (empty cancels): ')
-
-  if ans !~# '^\s*$'
-    try
-      silent execute 'normal! ' . printf(a:cmd, ans)
-    catch /E387/ "E387: Match is on current line
-    endtry
-  endif
-endfunction