Removed reference to HideBackOfficeLogo content setting that is now obsolete and not used. (#6850)

Author: AndyButland

15/umbraco-cms/reference/configuration/contentsettings.md

@@ -26,7 +26,6 @@ The following snippet will give an overview of the keys and values in the conten
       "DisallowedUploadFiles": ["ashx", "aspx", "ascx", "config", "cshtml", "vbhtml", "asmx", "air", "axd", "xamlx"],
       "DisallowedUploadedFileExtensions": ["ashx", "aspx", "ascx", "config", "cshtml", "vbhtml", "asmx", "air", "axd", "xamlx"],
       "Error404Collection": [],
-      "HideBackOfficeLogo": false,
       "Imaging": {
         "ImageFileTypes": ["jpeg", "jpg", "gif", "bmp", "png", "tiff", "tif"],
         "AutoFillImageProperties": [
@@ -128,10 +127,6 @@ If you have multiple sites, with different cultures, setup in your tree then you
 
 If you have more than two sites and forget to add a 404 page and a culture, the default page will act as fallback. Same happens if you for some reason forget to define a hostname on a site.
 
-### Hide backoffice logo
-
-This setting can be used to hide the Umbraco logo in backoffice.
-
 ### Login background image
 
 You can specify your own background image for the login screen here. The image will automatically get an overlay to match backoffice colors. This path is relative to the `wwwroot/umbraco` path. The default location is: `wwwroot/umbraco/login/login.jpg`.