FAQ: remove "Why is there a HTTP/1.1 in my HTTP/2 request?"

This hasn't been the case for a while now, remove.
diff --git a/docs/FAQ b/docs/FAQ
index d2da12e..e17fee3 100644
--- a/docs/FAQ
+++ b/docs/FAQ
@@ -78,7 +78,6 @@
   4.18 file:// URLs containing drive letters (Windows, NetWare)
   4.19 Why doesn't curl return an error when the network cable is unplugged?
   4.20 curl doesn't return error for HTTP non-200 responses!
-  4.21 Why is there a HTTP/1.1 in my HTTP/2 request?
 
  5. libcurl Issues
   5.1 Is libcurl thread-safe?
@@ -1091,17 +1090,6 @@
   You can also use the -w option and the variable %{response_code} to extract
   the exact response code that was returned in the response.
 
-  4.21 Why is there a HTTP/1.1 in my HTTP/2 request?
-
-  If you use verbose to see the HTTP request when you send off a HTTP/2
-  request, it will still say 1.1.
-
-  The reason for this is that we first generate the request to send using the
-  old 1.1 style and show that request in the verbose output, and then we
-  convert it over to the binary header-compressed HTTP/2 style. The actual
-  "1.1" part from that request is then not actually used in the transfer.
-  The binary HTTP/2 headers are not human readable.
-
 5. libcurl Issues
 
   5.1 Is libcurl thread-safe?