nvim: completion: fix no workie after repeated compile

I re-arranged the dependencies. Now it looks more like the example in
the readme.

.config/nvim/lua/my/completion.lua

@@ -3,6 +3,14 @@ require('my/plugins')
 packer.use {
     'https://github.com/hrsh7th/nvim-cmp',
     requires = {
+        {
+            'https://github.com/hrsh7th/cmp-nvim-lsp',
+            requires = 'https://github.com/neovim/nvim-lspconfig';
+        },
+        'https://github.com/hrsh7th/cmp-buffer',
+        'https://github.com/hrsh7th/cmp-path',
+        'https://github.com/hrsh7th/cmp-cmdline',
+        -- 'https://github.com/hrsh7th/cmp-nvim-lua',
         {
             'https://github.com/saadparwaiz1/cmp_luasnip',
             requires = 'https://github.com/L3MON4D3/LuaSnip'
@@ -76,35 +84,3 @@ packer.use {
         })
     end
 }
-
-packer.use {
-    'https://github.com/hrsh7th/cmp-nvim-lsp',
-    requires = 'https://github.com/hrsh7th/nvim-cmp',
-    config = function()
-        require'cmp'.setup {
-            sources = {
-                name = 'nvim_lsp'
-            }
-        }
-    end
-}
-
-packer.use {
-    'https://github.com/hrsh7th/cmp-buffer',
-    requires = 'https://github.com/hrsh7th/nvim-cmp',
-}
-
-packer.use {
-    'https://github.com/hrsh7th/cmp-path',
-    requires = 'https://github.com/hrsh7th/nvim-cmp',
-}
-
-packer.use {
-    'https://github.com/hrsh7th/cmp-cmdline',
-    requires = 'https://github.com/hrsh7th/nvim-cmp',
-}
-
--- packer.use {
---     'https://github.com/hrsh7th/cmp-nvim-lua',
---     requires = 'https://github.com/hrsh7th/nvim-cmp',
--- }

.config/nvim/lua/my/lsp.lua

@@ -4,9 +4,6 @@ require('my/completion')
 
 packer.use {
     'https://github.com/neovim/nvim-lspconfig',
-    requires = {
-        'https://github.com/hrsh7th/cmp-nvim-lsp'
-    },
     config = function()
         map('n', '<f5>', vim.diagnostic.goto_prev)
         map('n', '<f6>', vim.diagnostic.goto_next)