Partial revert Referrer-Policy (#7478)

https://github.com/FreshRSS/FreshRSS/pull/6303#issuecomment-2768907702
Was already implemented conditionally
https://github.com/FreshRSS/FreshRSS/pull/1198

p/.htaccess

@@ -41,7 +41,6 @@ AddDefaultCharset	UTF-8
 		Header	merge Cache-Control "public"
 	</FilesMatch>
 	Header edit Set-Cookie ^(.*)$ "$1; SameSite=Lax"
-	Header set Referrer-Policy "same-origin"
 </IfModule>
 
 # Provide the true IP address of the connection (e.g. last proxy), even when using mod_remoteip