Revert plugin js changes (#5139)

* Revert "Add disabled_plugins to preloadstore for login_required anonymous users (#5134)"

This reverts commit b840170f8d.

* Revert "Do not load javascripts for disabled plugins (#5103)"

This reverts commit a14ab48829.

lib/discourse_wrap_plugin_js.rb

@@ -1,31 +0,0 @@
-class DiscourseWrapPluginJS
-  def initialize(options = {}, &block)
-  end
-
-  def self.instance
-    @instance ||= new
-  end
-
-  def self.call(input)
-    instance.call(input)
-  end
-
-  # Add stuff around javascript
-  def call(input)
-    path = input[:environment].context_class.new(input).pathname.to_s
-    data = input[:data]
-
-    # Only apply to plugin paths
-    return data unless (path =~ /\/plugins\//)
-
-    # Find the folder name of the plugin
-    folder_name = path[/\/plugins\/(\S+?)\//, 1]
-
-    # Lookup plugin name
-    plugin = Discourse.plugins.find { |p| p.path =~ /\/plugins\/#{folder_name}\// }
-    plugin_name = plugin.name
-
-    "Discourse._registerPluginScriptDefinition('#{plugin_name}', function(){#{data}}); \n"
-  end
-
-end