test: remove helpers.sleep()

test/functional/lua/highlight_spec.lua

@@ -16,7 +16,7 @@ describe('vim.highlight.on_yank', function()
       vim.highlight.on_yank({timeout = 10, on_macro = true, event = {operator = "y", regtype = "v"}})
       vim.cmd('bwipeout!')
     ]])
-    helpers.sleep(10)
+    vim.uv.sleep(10)
     helpers.feed('<cr>') -- avoid hang if error message exists
     eq('', eval('v:errmsg'))
   end)

test/functional/lua/loader_spec.lua

@@ -30,7 +30,7 @@ describe('vim.loader', function()
     )
 
     -- fs latency
-    helpers.sleep(10)
+    vim.uv.sleep(10)
 
     eq(
       2,

test/functional/lua/loop_spec.lua

@@ -4,7 +4,7 @@ local Screen = require('test.functional.ui.screen')
 local funcs = helpers.funcs
 local meths = helpers.meths
 local clear = helpers.clear
-local sleep = helpers.sleep
+local sleep = vim.uv.sleep
 local feed = helpers.feed
 local eq = helpers.eq
 local eval = helpers.eval

test/functional/lua/snippet_spec.lua

@@ -7,7 +7,7 @@ local exec_lua = helpers.exec_lua
 local feed = helpers.feed
 local matches = helpers.matches
 local pcall_err = helpers.pcall_err
-local sleep = helpers.sleep
+local sleep = vim.uv.sleep
 
 describe('vim.snippet', function()
   before_each(function()