fix(cli): serverlist previewer don't work when headless instance have float window

openpty is used to avoid some bug in upstream (some weird crash)
but it seems no longer reproduce now

Author: phanen

lua/fzf-lua/previewer/fzf.lua

@@ -537,25 +537,23 @@ local function make_screenshot(screenshot, addr, lines, columns)
       end)
     ]], { lines, columns, screenshot })
   end
-  local jobstart = _G.fzf_pty_spawn or vim.fn.jobstart
   local nvim_bin = os.getenv("FZF_LUA_NVIM_BIN") or vim.v.progpath
-  local chan = jobstart({ nvim_bin, "--server", addr, "--remote-ui" }, {
+  local chan = vim.fn.jobstart({ nvim_bin, "--server", addr, "--remote-ui" }, {
     pty = true,
     height = lines,
     width = columns,
     env = {
       TERM = "xterm-256color",
-      VIMRUNTIME = vim.env.VIMRUNTIME,
+      VIMRUNTIME = os.getenv("VIMRUNTIME"),
     },
     on_stdout = function(chan0)
       if closing then return end
       closing = true
       vim.defer_fn(function() utils.rpcexec(addr, "nvim__screenshot", screenshot) end, 10)
-      if not _G.fzf_pty_spawn then vim.defer_fn(function() vim.fn.jobstop(chan0) end, 20) end
+      vim.defer_fn(function() vim.fn.jobstop(chan0) end, 20)
     end,
   })
-  if not _G.fzf_pty_spawn then return vim.fn.jobpid(chan) end
-  return chan
+  return vim.fn.jobpid(chan)
 end
 
 function Previewer.nvim_server:cmdline(_)