nvim: plugins: Drop the rtp fix for friendly-snippets

See the actual fix upstream
32ddc125ec

This could be probably unrelated and just was fixed in neovim core
perhaps. Either ways we do not need to do this anymore.

nvim/.config/nvim/lua/plugins.lua

@@ -125,10 +125,7 @@ local init = function ()
   }
   -- Snippets
   use 'hrsh7th/vim-vsnip'
-  use {
-    'rafamadriz/friendly-snippets',
-    rtp = '.'
-  }
+  use 'rafamadriz/friendly-snippets'
   -- For files with ANSI escape sequences
   use {
     'powerman/vim-plugin-AnsiEsc',