legacy tests: migrate test56

src/nvim/testdir/test56.in

@@ -1,21 +0,0 @@
-Test for script-local function.     vim: set ft=vim :
-
-STARTTEST
-:so small.vim
-:"
-:set nocp viminfo+=nviminfo
-:/^start:/+1,/^end:/-1w! Xtest.vim
-:source Xtest.vim
-_x
-:$-1,$wq! test.out
-ENDTEST
-
-start:
-fun <SID>DoLast()
-  call append(line('$'), "last line")
-endfun
-fun s:DoNothing()
-  call append(line('$'), "nothing line")
-endfun
-nnoremap <buffer> _x	:call <SID>DoNothing()<bar>call <SID>DoLast()<bar>delfunc <SID>DoNothing<bar>delfunc <SID>DoLast<cr>
-end:

src/nvim/testdir/test56.ok

@@ -1,2 +0,0 @@
-nothing line
-last line