Drop the boost 1.7 related dependency

- There are few pieces in the code, that depends on boost
  1.71 & 1.70 library.
- Now, that bmcweb is moving towards 1.73, we can safely remove
  those dependencies.

Tested By:
- Compiled in all sdks & unittests passed.

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: I9ac6a002bf389afcad0ddb92f2e0205043ddb347
diff --git a/http/http_request.h b/http/http_request.h
index 67cc944..0691465 100644
--- a/http/http_request.h
+++ b/http/http_request.h
@@ -7,13 +7,8 @@
 
 #include <boost/asio/io_context.hpp>
 #include <boost/beast/http.hpp>
-#include <boost/beast/websocket.hpp>
-
-#if BOOST_VERSION >= 107000
 #include <boost/beast/ssl/ssl_stream.hpp>
-#else
-#include <boost/beast/experimental/core/ssl_stream.hpp>
-#endif
+#include <boost/beast/websocket.hpp>
 
 namespace crow
 {