Remove: setting "no_http_content_downloads" (#12058)

As we now use HTTPS, it is very likely this will work on most systems.
For systems that do have HTTPS blocked, it will fail instantly,
and it will fallback to TCP anyway. That makes this setting no longer
very useful.

src/table/settings/network_private_settings.ini

@@ -76,12 +76,6 @@ flags    = SF_NOT_IN_SAVE | SF_NO_NETWORK_SYNC
 def      = """"
 cat      = SC_EXPERT
 
-[SDTC_BOOL]
-var      = network.no_http_content_downloads
-flags    = SF_NOT_IN_SAVE | SF_NO_NETWORK_SYNC
-def      = false
-cat      = SC_EXPERT
-
 [SDTC_OMANY]
 var      = network.use_relay_service
 type     = SLE_UINT8