nvim: lua: plugins: Remove post install hook for fzf

The post install hook does not work in packer currently and has no
effect. Remove it.

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

@@ -10,12 +10,7 @@ local init = function ()
     config = "require('modules.sneak')"
   }
   -- Search
-  use {
-    'junegunn/fzf',
-    run = function()
-      vim.fn['fzf#install'](0)
-    end
-  }
+  use 'junegunn/fzf'
   use {
     'junegunn/fzf.vim',
     config = "require('modules.fzf')"