Clean up BMCWEB_ENABLE_SSL

This macro came originally from CROW_ENABLE_SSL, and was used as a macro
to optionally compile without openssl being required.

OpenSSL has been pulled into many other dependencies, and has been
functionally required to be included for a long time, so there's no
reason to hold onto this macro.

Remove most uses of the macro, and for the couple functional places the
macro is used, transition to a constexpr if to enable the TLS paths.

This allows a large simplification of code in some places.

Tested: Redfish service validator passes.

Change-Id: Iebd46a68e5e417b6031479e24be3c21bef782f4c
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/http/websocket.hpp b/http/websocket.hpp
index 4262c70..e669ffa 100644
--- a/http/websocket.hpp
+++ b/http/websocket.hpp
@@ -6,14 +6,11 @@
 #include <boost/asio/buffer.hpp>
 #include <boost/beast/core/multi_buffer.hpp>
 #include <boost/beast/websocket.hpp>
+#include <boost/beast/websocket/ssl.hpp>
 
 #include <array>
 #include <functional>
 
-#ifdef BMCWEB_ENABLE_SSL
-#include <boost/beast/websocket/ssl.hpp>
-#endif
-
 namespace crow
 {
 namespace websocket