Improve log message for non-AMQP clients on AMQP port

This is a follow up to #13559 addressing the feedback in
#13559 (comment)

The improved logs look as follows:
```
openssl s_client -connect localhost:5672 -tls1_3

[info] <0.946.0> accepting AMQP connection [::1]:49321 -> [::1]:5672
[error] <0.946.0> closing AMQP connection [::1]:49321 -> [::1]:5672 (duration: '0ms'):
[error] <0.946.0> TLS client detected on non-TLS AMQP port. Ensure the client is connecting to the correct port.
```

```
curl http://localhost:5672

[info] <0.954.0> accepting AMQP connection [::1]:49402 -> [::1]:5672
[error] <0.954.0> closing AMQP connection [::1]:49402 -> [::1]:5672 (duration: '0ms'):
[error] <0.954.0> HTTP GET request detected on AMQP port. Ensure the client is connecting to the correct port
```

```
telnet localhost 5672
Trying ::1...
Connected to localhost.
Escape character is '^]'.
hello

[info] <0.946.0> accepting AMQP connection [::1]:49664 -> [::1]:5672
[error] <0.946.0> closing AMQP connection [::1]:49664 -> [::1]:5672 (duration: '2s'):
[error] <0.946.0> client did not start with AMQP protocol header: <<"hello\r\n\r">>
```

Author: ansd

deps/rabbit/src/rabbit_reader.erl

@@ -1136,17 +1136,7 @@ handle_input(handshake,
     %% Looks like a TLS client hello.
     refuse_connection(Sock, {bad_header, detected_tls});
 handle_input(handshake, <<Other:8/binary, _/binary>>, #v1{sock = Sock}) ->
-    Reason = case Other of
-                 <<16#16, 16#03, _Ver2, _Len1, _Len2, 16#01, _, _>> ->
-                     %% Looks like a TLS client hello.
-                     detected_unexpected_tls_header;
-                 <<"GET ", _URL/binary>> ->
-                     %% Looks like an HTTP request.
-                     detected_unexpected_http_header;
-                 _ ->
-                     bad_header
-             end,
-    refuse_connection(Sock, {Reason, Other});
+    refuse_connection(Sock, {bad_header, Other});
 handle_input(Callback, Data, _State) ->
     throw({bad_input, Callback, Data}).