test: use vim.mpack and vim.uv directly

test/functional/lua/buffer_updates_spec.lua

@@ -1,6 +1,5 @@
 -- Test suite for testing interactions with API bindings
 local helpers = require('test.functional.helpers')(after_each)
-local luv = require('luv')
 
 local command = helpers.command
 local meths = helpers.meths
@@ -777,7 +776,7 @@ describe('lua: nvim_buf_attach on_bytes', function()
         old line 2]]
       )
       local atime = os.time() - 10
-      luv.fs_utime('Xtest-reload', atime, atime)
+      vim.uv.fs_utime('Xtest-reload', atime, atime)
       command 'e Xtest-reload'
       command 'set autoread'
 

test/functional/lua/fs_spec.lua

@@ -1,5 +1,4 @@
 local helpers = require('test.functional.helpers')(after_each)
-local uv = require('luv')
 
 local clear = helpers.clear
 local exec_lua = helpers.exec_lua
@@ -293,7 +292,7 @@ describe('vim.fs', function()
       eq('/', vim.fs.normalize('/'))
     end)
     it('works with ~', function()
-      eq(vim.fs.normalize(uv.os_homedir()) .. '/src/foo', vim.fs.normalize('~/src/foo'))
+      eq(vim.fs.normalize(vim.uv.os_homedir()) .. '/src/foo', vim.fs.normalize('~/src/foo'))
     end)
     it('works with environment variables', function()
       local xdg_config_home = test_build_dir .. '/.config'

test/functional/lua/loop_spec.lua

@@ -24,13 +24,11 @@ describe('vim.uv', function()
     exec_lua('vim.api.nvim_set_var("coroutine_cnt", 0)', {})
 
     local code = [[
-      local uv = vim.uv
-
       local touch = 0
       local function wait(ms)
         local this = coroutine.running()
         assert(this)
-        local timer = uv.new_timer()
+        local timer = vim.uv.new_timer()
         timer:start(ms, 0, vim.schedule_wrap(function ()
           timer:close()
           touch = touch + 1