[Neovim] Remove PackClean command

I like the idea of a command that will remove unused plugins.
Unfortunately it operates based on which plugins have been registered.
As I only register some of the plugins through autocommands,
`:PackClean` can remove plugins I actively use. Until I can come up with
a better way to do this, I'm removing the command.

Author: dirn

.config/nvim/plugin/init.lua

@@ -1,21 +1,3 @@
-vim.api.nvim_create_user_command("PackClean", function()
-  local inactive = vim
-    .iter(vim.pack.get())
-    :filter(function(plugin)
-      return not plugin.active
-    end)
-    :map(function(plugin)
-      return plugin.spec.name
-    end)
-    :totable()
-
-  if #inactive > 0 then
-    vim.pack.del(inactive)
-  end
-end, {
-  desc = "Uninstall plugins not included in the pack.",
-})
-
 vim.api.nvim_create_user_command("PackRestore", function()
   vim.pack.update(nil, { target = "lockfile", force = true })
 end, {