vim-patch:9.0.1214: file left behind after running tests

Problem:    File left behind after running tests.
Solution:   Delete the file. (Dominique Pellé, closes vim/vim#11839)

541c87c808

Co-authored-by: Dominique Pelle <dominique.pelle@gmail.com>

src/nvim/testdir/test_autocmd.vim

@@ -629,6 +629,7 @@ func Test_WinScrolled_diff()
         \ }, event)
 
   call StopVimInTerminal(buf)
+  call delete('XscrollEvent')
 endfunc
 
 func Test_WinClosed()