MaxUploadSize site setting can be safely dropped now

Author: Oaphi

db/seeds/site_settings.yml

@@ -180,15 +180,6 @@
   description: >
     The maximum number of characters an edit comment may contain. Defaults to 255.
 
-- name: MaxUploadSize
-  value: 2MB
-  value_type: string
-  category: AdvancedSettings
-  description: >
-    The maximum size of images that users may upload. Changing this setting DOES NOT change the limit - the limit is
-    set by your web server configuration. This setting should be set to the same value so that the correct limit
-    can be displayed to users.
-
 - name: MaxRequestBodySize
   value: 2097152
   value_type: integer